Revert "Comment for statement that does not loop, waiting clever analysis"

This reverts commit 56a3e092c3686d5e36e2786d69a5612c94faaebd.

src/animation/AnimationMixer.js

@@ -654,7 +654,7 @@ Object.assign( AnimationMixer.prototype, {
 
 		remove_empty_map: {
 
-			// for ( var _ in bindingByName ) break remove_empty_map;
+			for ( var _ in bindingByName ) break remove_empty_map;
 
 			delete bindingsByRoot[ rootUuid ];