contrib: remove old test scripts stale references

diff --git a/.github/labeler.yml b/.github/labeler.yml
index 884b5961..07a8085b 100644
--- a/.github/labeler.yml
+++ b/.github/labeler.yml
@@ -5,11 +5,6 @@ test:
   - changed-files:
     - any-glob-to-any-file: fuzz/**
     - any-glob-to-any-file: '*/tests/**'
-    - any-glob-to-any-file: 'dep_test'
-    - any-glob-to-any-file: 'contrib/run_task.sh'
-    - any-glob-to-any-file: 'contrib/test_vars.sh'
-    - any-glob-to-any-file: '*/contrib/extra_tests.sh'
-    - any-glob-to-any-file: '*/contrib/test_vars.sh'
 doc:
   - changed-files:
     - any-glob-to-any-file: '**/*.md'
diff --git a/.gitignore b/.gitignore
index cf2a7cdb..05378fdc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,7 +13,6 @@ bitcoin/target
 hashes/target
 
 # Test artifacts
-bitcoin/dep_test
 mutants.out*
 fuzz/coverage
 
diff --git a/contrib/gen_label_config.sh b/contrib/gen_label_config.sh
index 85ad9a93..1527891f 100755
--- a/contrib/gen_label_config.sh
+++ b/contrib/gen_label_config.sh
@@ -18,7 +18,7 @@ then
 	exit 1
 fi
 
-excluded_crates="fuzz|dep_test"
+excluded_crates="fuzz"
 
 CRATES="$(cd "$SCAN_DIR" && cargo metadata --no-deps --format-version 1 | jq -j -r '.packages | map(.manifest_path | rtrimstr("/Cargo.toml") | ltrimstr("'"$PWD"'/")) | join(" ")')"
 
diff --git a/contrib/test-miri.sh b/contrib/test-miri.sh
index 5e979a6f..66b603d7 100755
--- a/contrib/test-miri.sh
+++ b/contrib/test-miri.sh
@@ -4,7 +4,7 @@ set -euox pipefail
 
 cd "$(dirname "$0")/.."
 
-. contrib/test_vars.sh
+CRATES="$(cargo metadata --no-deps --format-version 1 | jq -j -r '.packages | map(.manifest_path | rtrimstr("/Cargo.toml") | ltrimstr("'"$PWD"'/")) | join(" ")')"
 
 target_features="$(rustc --print target-features | awk '{ if ($1 == "") { exit 0 } if (NR != 1 && $1 != "crt-static" && $1 != "soft-float") { if (NR == 2) { printf "+%s", $1 } else { printf ",+%s", $1 } } }')"
 
diff --git a/contrib/test_vars.sh b/contrib/test_vars.sh
deleted file mode 100644
index 3943aac6..00000000
--- a/contrib/test_vars.sh
+++ /dev/null
@@ -1,13 +0,0 @@
-# No shebang, this file should not be executed.
-# shellcheck disable=SC2148
-#
-#
-# Used by labeler.yaml
-#
-# Not to be confused with the per crate `test_vars.sh` used by
-# `rust-bitcoin-maintainer-tools-run_task.sh`.
-# disable verify unused vars, despite the fact that they are used when sourced
-# shellcheck disable=SC2034
-
-CRATES="$(cargo metadata --no-deps --format-version 1 | jq -j -r '.packages | map(.manifest_path | rtrimstr("/Cargo.toml") | ltrimstr("'"$PWD"'/")) | join(" ")')"
-DEPS="recent minimal"