DevTools: clean up scripts folder

third_party/WebKit/Source/devtools/scripts/jsdoc_validator/tests/this.js

 this.foo = this.foo + 1; // OK - outside of function.
 
 function f() {
     this.foo = this.foo + 1; // OK - global |this|.
 }
 
 /**
  * @constructor
  */
 function TypeOne() {
@@ skipping 264 matching lines @@
          * @this {Object}
          */
         function callbackNotReferencingThisAnnotated()
         {
         }
         this.memberTwo(callbackNotReferencingThisAnnotated); // OK - Has @this annotation, but does not reference |this|.
     },
 
     memberTwo: function(arg) {}
 }