sqldb: remove unused GetInvoice query

diff --git a/sqldb/sqlc/invoices.sql.go b/sqldb/sqlc/invoices.sql.go
index cbf2cdb..9743f2b 100644
--- a/sqldb/sqlc/invoices.sql.go
+++ b/sqldb/sqlc/invoices.sql.go
@@ -396,86 +396,6 @@ func (q *Queries) FilterInvoicesReverse(ctx context.Context, arg FilterInvoicesR
 	return items, nil
 }
 
-const getInvoice = `-- name: GetInvoice :many
-
-SELECT i.id, i.hash, i.preimage, i.settle_index, i.settled_at, i.memo, i.amount_msat, i.cltv_delta, i.expiry, i.payment_addr, i.payment_request, i.payment_request_hash, i.state, i.amount_paid_msat, i.is_amp, i.is_hodl, i.is_keysend, i.created_at
-FROM invoices i
-LEFT JOIN amp_sub_invoices a 
-ON i.id = a.invoice_id
-AND (
-    a.set_id = $1 OR $1 IS NULL
-)
-WHERE (
-    i.id = $2 OR 
-    $2 IS NULL
-) AND (
-    i.hash = $3 OR 
-    $3 IS NULL
-) AND (
-    i.payment_addr = $4 OR 
-    $4 IS NULL
-)
-GROUP BY i.id
-LIMIT 2
-`
-
-type GetInvoiceParams struct {
-	SetID       []byte
-	AddIndex    sql.NullInt64
-	Hash        []byte
-	PaymentAddr []byte
-}
-
-// This method may return more than one invoice if filter using multiple fields
-// from different invoices. It is the caller's responsibility to ensure that
-// we bubble up an error in those cases.
-func (q *Queries) GetInvoice(ctx context.Context, arg GetInvoiceParams) ([]Invoice, error) {
-	rows, err := q.db.QueryContext(ctx, getInvoice,
-		arg.SetID,
-		arg.AddIndex,
-		arg.Hash,
-		arg.PaymentAddr,
-	)
-	if err != nil {
-		return nil, err
-	}
-	defer rows.Close()
-	var items []Invoice
-	for rows.Next() {
-		var i Invoice
-		if err := rows.Scan(
-			&i.ID,
-			&i.Hash,
-			&i.Preimage,
-			&i.SettleIndex,
-			&i.SettledAt,
-			&i.Memo,
-			&i.AmountMsat,
-			&i.CltvDelta,
-			&i.Expiry,
-			&i.PaymentAddr,
-			&i.PaymentRequest,
-			&i.PaymentRequestHash,
-			&i.State,
-			&i.AmountPaidMsat,
-			&i.IsAmp,
-			&i.IsHodl,
-			&i.IsKeysend,
-			&i.CreatedAt,
-		); err != nil {
-			return nil, err
-		}
-		items = append(items, i)
-	}
-	if err := rows.Close(); err != nil {
-		return nil, err
-	}
-	if err := rows.Err(); err != nil {
-		return nil, err
-	}
-	return items, nil
-}
-
 const getInvoiceByAddr = `-- name: GetInvoiceByAddr :one
 SELECT i.id, i.hash, i.preimage, i.settle_index, i.settled_at, i.memo, i.amount_msat, i.cltv_delta, i.expiry, i.payment_addr, i.payment_request, i.payment_request_hash, i.state, i.amount_paid_msat, i.is_amp, i.is_hodl, i.is_keysend, i.created_at
 FROM invoices i
diff --git a/sqldb/sqlc/querier.go b/sqldb/sqlc/querier.go
index 9182794..c2d9c81 100644
--- a/sqldb/sqlc/querier.go
+++ b/sqldb/sqlc/querier.go
@@ -107,10 +107,6 @@ type Querier interface {
 	GetClosedChannelsSCIDs(ctx context.Context, scids [][]byte) ([][]byte, error)
 	GetDatabaseVersion(ctx context.Context) (int32, error)
 	GetExtraNodeTypes(ctx context.Context, nodeID int64) ([]GraphNodeExtraType, error)
-	// This method may return more than one invoice if filter using multiple fields
-	// from different invoices. It is the caller's responsibility to ensure that
-	// we bubble up an error in those cases.
-	GetInvoice(ctx context.Context, arg GetInvoiceParams) ([]Invoice, error)
 	GetInvoiceByAddr(ctx context.Context, paymentAddr []byte) (Invoice, error)
 	GetInvoiceByHash(ctx context.Context, hash []byte) (Invoice, error)
 	// TODO(ziggie): This query can only return one invoice if the set_id is
diff --git a/sqldb/sqlc/queries/invoices.sql b/sqldb/sqlc/queries/invoices.sql
index dab1ff0..1ec96ac 100644
--- a/sqldb/sqlc/queries/invoices.sql
+++ b/sqldb/sqlc/queries/invoices.sql
@@ -29,31 +29,6 @@ SELECT *
 FROM invoice_features
 WHERE invoice_id = $1;
 
--- This method may return more than one invoice if filter using multiple fields
--- from different invoices. It is the caller's responsibility to ensure that 
--- we bubble up an error in those cases.
-
--- name: GetInvoice :many
-SELECT i.*
-FROM invoices i
-LEFT JOIN amp_sub_invoices a 
-ON i.id = a.invoice_id
-AND (
-    a.set_id = sqlc.narg('set_id') OR sqlc.narg('set_id') IS NULL
-)
-WHERE (
-    i.id = sqlc.narg('add_index') OR 
-    sqlc.narg('add_index') IS NULL
-) AND (
-    i.hash = sqlc.narg('hash') OR 
-    sqlc.narg('hash') IS NULL
-) AND (
-    i.payment_addr = sqlc.narg('payment_addr') OR 
-    sqlc.narg('payment_addr') IS NULL
-)
-GROUP BY i.id
-LIMIT 2;
-
 -- name: GetInvoiceByHash :one
 SELECT i.*
 FROM invoices i