Remove filter_is_cookie_valid

This function is no longer needed.

core/current_user_api.php

@@ -249,8 +249,6 @@ function current_user_get_bug_filter( $p_project_id = null ) {
 			$t_filter = json_decode( $t_token, true );
 		}
 		$t_filter = filter_ensure_valid_filter( $t_filter );
-	} else if( !filter_is_cookie_valid() ) {
-		$t_filter = filter_get_default();
 	} else {
 		$t_user_id = auth_get_current_user_id();
 		$t_filter = user_get_bug_filter( $t_user_id, $p_project_id );

core/filter_api.php

@@ -1003,40 +1003,6 @@ function filter_serialize( $p_filter_array ) {
 	return $t_settings_string;
 }
 
-/**
- * Check if the filter cookie exists and is of the correct version.
- * @return boolean
- */
-function filter_is_cookie_valid() {
-	$t_view_all_cookie_id = gpc_get_cookie( config_get_global( 'view_all_cookie' ), '' );
-	$t_view_all_cookie = filter_db_get_filter_string( $t_view_all_cookie_id );
-
-	# check to see if the cookie does not exist
-	if( is_blank( $t_view_all_cookie ) ) {
-		return false;
-	}
-
-	# check to see if new cookie is needed
-	$t_setting_arr = explode( '#', $t_view_all_cookie, 2 );
-	if( ( $t_setting_arr[0] == 'v1' ) || ( $t_setting_arr[0] == 'v2' ) || ( $t_setting_arr[0] == 'v3' ) || ( $t_setting_arr[0] == 'v4' ) ) {
-		return false;
-	}
-
-	# We shouldn't need to do this anymore, as filters from v5 onwards should cope with changing
-	# filter indices dynamically
-	$t_filter_cookie_arr = array();
-	if( isset( $t_setting_arr[1] ) ) {
-		$t_filter_cookie_arr = json_decode( $t_setting_arr[1], true );
-	} else {
-		return false;
-	}
-	if( $t_filter_cookie_arr['_version'] != FILTER_VERSION ) {
-		return false;
-	}
-
-	return true;
-}
-
 /**
  * Get the filter db row $p_filter_id
  * using the cached row if it's available