Remove `index_on_projects_path` index

Remove duplicated index.

Relates to: !135366
Changelog: performance

db/post_migrate/20231027083355_remove_projects_duplicated_indexes.rb

+# frozen_string_literal: true
+
+class RemoveProjectsDuplicatedIndexes < Gitlab::Database::Migration[2.2]
+  disable_ddl_transaction!
+
+  milestone '16.6'
+
+  INDEX_NAME = :index_on_projects_path
+  TABLE_NAME = :projects
+
+  def up
+    remove_concurrent_index_by_name TABLE_NAME, INDEX_NAME
+  end
+
+  def down
+    add_concurrent_index TABLE_NAME, :path, name: INDEX_NAME
+  end
+end

db/schema_migrations/20231027083355

+ce4863f02f807498da9c3cf7b49d85a2e5a296903fe0673bfa6f40d50c8a51b5
\ No newline at end of file

db/structure.sql

@@ -33587,8 +33587,6 @@ CREATE UNIQUE INDEX index_on_project_id_escalation_policy_name_unique ON inciden
 CREATE INDEX index_on_projects_lower_path ON projects USING btree (lower((path)::text));
-CREATE INDEX index_on_projects_path ON projects USING btree (path);
-
 CREATE INDEX index_on_routes_lower_path ON routes USING btree (lower((path)::text));
 CREATE INDEX index_on_sbom_sources_package_manager_name ON sbom_sources USING btree ((((source -> 'package_manager'::text) ->> 'name'::text)));

spec/support/helpers/database/duplicate_indexes.yml

@@ -167,11 +167,6 @@ project_repositories:
 project_topics:
   index_project_topics_on_project_id_and_topic_id:
     - index_project_topics_on_project_id
-projects:
-  index_projects_api_path_id_desc:
-    - index_on_projects_path
-  index_projects_on_path_and_id:
-    - index_on_projects_path
 protected_environments:
   index_protected_environments_on_project_id_and_name:
     - index_protected_environments_on_project_id