remove dead helper

Author: cheerfulScumbag

src/mango.c

@@ -1313,11 +1313,6 @@ static char *mango_session_strip_exec_field_codes(const char *exec) {
 	return result;
 }
 
-static bool mango_session_path_exists(const char *path) {
-	struct stat st;
-	return path && stat(path, &st) == 0;
-}
-
 typedef struct {
 	char *path;
 	char *exec_value;