Remove incorrectly placed db_param_push()

When db_query() is called without a parameter array, the db_param stack
is not popped automatically, so in this case the db_param_push was not
being popped after query execution.

Fixes #21649

core/category_api.php

@@ -265,7 +265,6 @@ function category_remove_all( $p_project_id, $p_new_category_id = 0 ) {
 	$t_category_ids = join( ',', $t_category_ids );
 
 	# update bug history entries
-	db_param_push();
 	$t_query = 'SELECT id, category_id FROM {bug} WHERE category_id IN ( ' . $t_category_ids . ' )';
 	$t_result = db_query( $t_query );
 

core/custom_field_api.php

@@ -731,7 +731,6 @@ function custom_field_get_ids() {
 	global $g_cache_cf_list, $g_cache_custom_field;
 
 	if( $g_cache_cf_list === null ) {
-		db_param_push();
 		$t_query = 'SELECT * FROM {custom_field} ORDER BY name ASC';
 		$t_result = db_query( $t_query );
 		$t_ids = array();

core/email_queue_api.php

@@ -192,7 +192,6 @@ function email_queue_delete( $p_email_id ) {
  * @return array
  */
 function email_queue_get_ids() {
-	db_param_push();
 	$t_query = 'SELECT email_id FROM {email} ORDER BY email_id ASC';
 	$t_result = db_query( $t_query );