Clean up comments.

src/animation/PropertyBinding.js

@@ -702,7 +702,7 @@ Object.assign( PropertyBinding.prototype, { // prototype, continued
 
 } );
 
-//!\ DECLARE ALIAS AFTER assign prototype !
+// DECLARE ALIAS AFTER assign prototype
 Object.assign( PropertyBinding.prototype, {
 
 	// initial state of these methods that calls 'bind'

src/math/Interpolant.js

@@ -244,7 +244,7 @@ Object.assign( Interpolant.prototype, {
 
 } );
 
-//!\ DECLARE ALIAS AFTER assign prototype !
+// DECLARE ALIAS AFTER assign prototype
 Object.assign( Interpolant.prototype, {
 
 	//( 0, t, t0 ), returns this.resultBuffer