chore(styleDirective): remove an unneccessary directive definition

Since the style directive is defined as a non-terminal element directive
with no behavior on link, we may as well not define anything at all.
PR (#14983)

angularFiles.js

@@ -80,7 +80,6 @@ var angularFiles = {
     'src/ng/directive/ngTransclude.js',
     'src/ng/directive/script.js',
     'src/ng/directive/select.js',
-    'src/ng/directive/style.js',
     'src/ng/directive/validators.js',
     'src/angular.bind.js',
     'src/publishExternalApis.js',

src/AngularPublic.js

@@ -11,7 +11,6 @@
   formDirective,
   scriptDirective,
   selectDirective,
-  styleDirective,
   optionDirective,
   ngBindDirective,
   ngBindHtmlDirective,
@@ -176,7 +175,6 @@ function publishExternalAPI(angular) {
             form: formDirective,
             script: scriptDirective,
             select: selectDirective,
-            style: styleDirective,
             option: optionDirective,
             ngBind: ngBindDirective,
             ngBindHtml: ngBindHtmlDirective,

src/ng/directive/style.js

@@ -1,6 +0,0 @@
-'use strict';
-
-var styleDirective = valueFn({
-  restrict: 'E',
-  terminal: false
-});