Remove unused unload_all function

src/autoload.cpp

@@ -140,12 +140,6 @@ static bool script_name_precedes_script_name(const builtin_script_t &script1, co
     return wcscmp(script1.name, script2.name) < 0;
 }
 
-void autoload_t::unload_all(void)
-{
-    scoped_lock locker(lock);
-    this->evict_all_nodes();
-}
-
 /** Check whether the given command is loaded. */
 bool autoload_t::has_tried_loading(const wcstring &cmd)
 {

src/autoload.h

@@ -123,11 +123,6 @@ class autoload_t : private lru_cache_t<autoload_function_t>
     */
     int unload(const wcstring &cmd);
 
-    /**
-       Unloads all files.
-    */
-    void unload_all();
-
     /** Check whether the given command could be loaded, but do not load it. */
     bool can_load(const wcstring &cmd, const env_vars_snapshot_t &vars);