cmake: remove libevent

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 69ee5461..69db01f2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -221,10 +221,6 @@ target_link_libraries(core_interface INTERFACE
 include(AddBoostIfNeeded)
 add_boost_if_needed()
 
-if(BUILD_DAEMON OR BUILD_GUI OR BUILD_CLI OR BUILD_TESTS OR BUILD_BENCH OR BUILD_FUZZ_BINARY)
-  find_package(Libevent 2.1.8 MODULE REQUIRED)
-endif()
-
 if(ENABLE_WALLET)
   if(VCPKG_TARGET_TRIPLET)
     # Use of the `unofficial::` namespace is a vcpkg package manager convention.
diff --git a/cmake/module/FindLibevent.cmake b/cmake/module/FindLibevent.cmake
deleted file mode 100644
index c006b43d..00000000
--- a/cmake/module/FindLibevent.cmake
+++ /dev/null
@@ -1,86 +0,0 @@
-# Copyright (c) 2024-present The Bitcoin Core developers
-# Distributed under the MIT software license, see the accompanying
-# file COPYING or https://opensource.org/license/mit/.
-
-#[=======================================================================[
-FindLibevent
-------------
-
-Finds the Libevent headers and libraries.
-
-This is a wrapper around find_package()/pkg_check_modules() commands that:
- - facilitates searching in various build environments
- - prints a standard log message
-
-#]=======================================================================]
-
-# Check whether evhttp_connection_get_peer expects const char**.
-# See https://github.com/libevent/libevent/commit/a18301a2bb160ff7c3ffaf5b7653c39ffe27b385
-function(check_evhttp_connection_get_peer target)
-  include(CMakePushCheckState)
-  cmake_push_check_state(RESET)
-  set(CMAKE_REQUIRED_LIBRARIES ${target})
-  include(CheckCXXSourceCompiles)
-  check_cxx_source_compiles("
-    #include <cstdint>
-    #include <event2/http.h>
-
-    int main()
-    {
-        evhttp_connection* conn = (evhttp_connection*)1;
-        const char* host;
-        uint16_t port;
-        evhttp_connection_get_peer(conn, &host, &port);
-    }
-    " HAVE_EVHTTP_CONNECTION_GET_PEER_CONST_CHAR
-  )
-  cmake_pop_check_state()
-  target_compile_definitions(${target} INTERFACE
-    $<$<BOOL:${HAVE_EVHTTP_CONNECTION_GET_PEER_CONST_CHAR}>:HAVE_EVHTTP_CONNECTION_GET_PEER_CONST_CHAR>
-  )
-endfunction()
-
-set(_libevent_components core extra)
-if(NOT WIN32)
-  list(APPEND _libevent_components pthreads)
-endif()
-
-find_package(Libevent ${Libevent_FIND_VERSION} QUIET
-  NO_MODULE
-)
-
-include(FindPackageHandleStandardArgs)
-if(Libevent_FOUND)
-  find_package(Libevent ${Libevent_FIND_VERSION} QUIET
-    REQUIRED COMPONENTS ${_libevent_components}
-    NO_MODULE
-  )
-  find_package_handle_standard_args(Libevent
-    REQUIRED_VARS Libevent_DIR
-    VERSION_VAR Libevent_VERSION
-  )
-  check_evhttp_connection_get_peer(libevent::extra)
-else()
-  find_package(PkgConfig REQUIRED)
-  foreach(component IN LISTS _libevent_components)
-    pkg_check_modules(libevent_${component}
-      REQUIRED QUIET
-      IMPORTED_TARGET GLOBAL
-      libevent_${component}>=${Libevent_FIND_VERSION}
-    )
-    if(TARGET PkgConfig::libevent_${component} AND NOT TARGET libevent::${component})
-      add_library(libevent::${component} ALIAS PkgConfig::libevent_${component})
-    endif()
-  endforeach()
-  find_package_handle_standard_args(Libevent
-    REQUIRED_VARS libevent_core_LIBRARY_DIRS
-    VERSION_VAR libevent_core_VERSION
-  )
-  check_evhttp_connection_get_peer(PkgConfig::libevent_extra)
-endif()
-
-unset(_libevent_components)
-
-mark_as_advanced(Libevent_DIR)
-mark_as_advanced(_event_h)
-mark_as_advanced(_event_lib)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 524c2816..8c0977f0 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -290,9 +290,6 @@ target_link_libraries(bitcoin_node
     minisketch
     univalue
     Boost::headers
-    $<TARGET_NAME_IF_EXISTS:libevent::core>
-    $<TARGET_NAME_IF_EXISTS:libevent::extra>
-    $<TARGET_NAME_IF_EXISTS:libevent::pthreads>
     $<TARGET_NAME_IF_EXISTS:USDT::headers>
 )
 if(WITH_EMBEDDED_ASMAP)
diff --git a/src/support/events.h b/src/support/events.h
deleted file mode 100644
index a118ba32..00000000
--- a/src/support/events.h
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright (c) 2016-present The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#ifndef BITCOIN_SUPPORT_EVENTS_H
-#define BITCOIN_SUPPORT_EVENTS_H
-
-#include <ios>
-#include <memory>
-
-#include <event2/event.h>
-#include <event2/http.h>
-
-#define MAKE_RAII(type) \
-/* deleter */\
-struct type##_deleter {\
-    void operator()(struct type* ob) {\
-        type##_free(ob);\
-    }\
-};\
-/* unique ptr typedef */\
-typedef std::unique_ptr<struct type, type##_deleter> raii_##type
-
-MAKE_RAII(event_base);
-MAKE_RAII(event);
-MAKE_RAII(evhttp);
-
-inline raii_event_base obtain_event_base() {
-    auto result = raii_event_base(event_base_new());
-    if (!result.get())
-        throw std::runtime_error("cannot create event_base");
-    return result;
-}
-
-inline raii_event obtain_event(struct event_base* base, evutil_socket_t s, short events, event_callback_fn cb, void* arg) {
-    return raii_event(event_new(base, s, events, cb, arg));
-}
-
-inline raii_evhttp obtain_evhttp(struct event_base* base) {
-    return raii_evhttp(evhttp_new(base));
-}
-
-#endif // BITCOIN_SUPPORT_EVENTS_H
diff --git a/src/test/CMakeLists.txt b/src/test/CMakeLists.txt
index a25d9f90..e5619064 100644
--- a/src/test/CMakeLists.txt
+++ b/src/test/CMakeLists.txt
@@ -82,7 +82,6 @@ add_executable(test_bitcoin
   prevector_tests.cpp
   private_broadcast_tests.cpp
   psbt_tests.cpp
-  raii_event_tests.cpp
   random_tests.cpp
   rbf_tests.cpp
   rest_tests.cpp
@@ -168,7 +167,6 @@ target_link_libraries(test_bitcoin
   minisketch
   secp256k1
   Boost::headers
-  libevent::extra
   $<TARGET_NAME_IF_EXISTS:USDT::headers>
 )
 
diff --git a/src/test/fuzz/CMakeLists.txt b/src/test/fuzz/CMakeLists.txt
index a159ef7e..2d1fa3b7 100644
--- a/src/test/fuzz/CMakeLists.txt
+++ b/src/test/fuzz/CMakeLists.txt
@@ -154,7 +154,6 @@ target_link_libraries(fuzz
   univalue
   secp256k1
   Boost::headers
-  libevent::extra
 )
 
 if(ENABLE_WALLET)
diff --git a/src/test/raii_event_tests.cpp b/src/test/raii_event_tests.cpp
deleted file mode 100644
index 3a797dff..00000000
--- a/src/test/raii_event_tests.cpp
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright (c) 2016-present The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#include <event2/event.h>
-
-#include <cstdlib>
-#include <map>
-
-#include <support/events.h>
-
-#include <test/util/setup_common.h>
-
-#include <boost/test/unit_test.hpp>
-
-BOOST_FIXTURE_TEST_SUITE(raii_event_tests, BasicTestingSetup)
-
-#ifdef EVENT_SET_MEM_FUNCTIONS_IMPLEMENTED
-
-static std::map<void*, short> tags;
-static std::map<void*, uint16_t> orders;
-static uint16_t tagSequence = 0;
-
-static void* tag_malloc(size_t sz) {
-    void* mem = malloc(sz);
-    if (!mem) return mem;
-    tags[mem]++;
-    orders[mem] = tagSequence++;
-    return mem;
-}
-
-static void tag_free(void* mem) {
-    tags[mem]--;
-    orders[mem] = tagSequence++;
-    free(mem);
-}
-
-BOOST_AUTO_TEST_CASE(raii_event_creation)
-{
-    event_set_mem_functions(tag_malloc, realloc, tag_free);
-
-    void* base_ptr = nullptr;
-    {
-        auto base = obtain_event_base();
-        base_ptr = (void*)base.get();
-        BOOST_CHECK(tags[base_ptr] == 1);
-    }
-    BOOST_CHECK(tags[base_ptr] == 0);
-
-    void* event_ptr = nullptr;
-    {
-        auto base = obtain_event_base();
-        auto event = obtain_event(base.get(), -1, 0, nullptr, nullptr);
-
-        base_ptr = (void*)base.get();
-        event_ptr = (void*)event.get();
-
-        BOOST_CHECK(tags[base_ptr] == 1);
-        BOOST_CHECK(tags[event_ptr] == 1);
-    }
-    BOOST_CHECK(tags[base_ptr] == 0);
-    BOOST_CHECK(tags[event_ptr] == 0);
-
-    event_set_mem_functions(malloc, realloc, free);
-}
-
-BOOST_AUTO_TEST_CASE(raii_event_order)
-{
-    event_set_mem_functions(tag_malloc, realloc, tag_free);
-
-    void* base_ptr = nullptr;
-    void* event_ptr = nullptr;
-    {
-        auto base = obtain_event_base();
-        auto event = obtain_event(base.get(), -1, 0, nullptr, nullptr);
-
-        base_ptr = (void*)base.get();
-        event_ptr = (void*)event.get();
-
-        // base should have allocated before event
-        BOOST_CHECK(orders[base_ptr] < orders[event_ptr]);
-    }
-    // base should be freed after event
-    BOOST_CHECK(orders[base_ptr] > orders[event_ptr]);
-
-    event_set_mem_functions(malloc, realloc, free);
-}
-
-#endif  // EVENT_SET_MEM_FUNCTIONS_IMPLEMENTED
-
-BOOST_AUTO_TEST_SUITE_END()