Revert "macosx: VLCAdditions do not leak memory."

This reverts commit ccc1a9c2.

modules/gui/macosx/misc.m

@@ -102,11 +102,6 @@ static NSMapTable *VLCAdditions_userInfo = nil;
 - (void)dealloc
 {
     NSMapRemove(VLCAdditions_userInfo, self);
-    NSResetMapTable(VLCAdditions_userInfo);
-    /* NSCreateMapTable mallocs memory from the default zone ('malloc')
-     * thus releasing it with free() is save. */
-    free(VLCAdditions_userInfo);
-    VLCAdditions_userInfo = nil;
     [super dealloc];
 }