update(dialog): remove .md-actions deprecation (#9637)

* Removes the `.md-actions` deprecation from pre- v1.0.0
* Simplifies the method to search for a close button

Closes #9633

src/components/dialog/dialog.js

@@ -725,19 +725,9 @@ function MdDialogProvider($$interimElementProvider) {
       return dialogPopIn(element, options)
         .then(function() {
           lockScreenReader(element, options);
-          warnDeprecatedActions();
           focusOnOpen();
         });
 
-      /**
-       * Check to see if they used the deprecated .md-actions class and log a warning
-       */
-      function warnDeprecatedActions() {
-        if (element[0].querySelector('.md-actions')) {
-          $log.warn('Using a class of md-actions is deprecated, please use <md-dialog-actions>.');
-        }
-      }
-
       /**
        * For alerts, focus on content... otherwise focus on
        * the close button (or equivalent)
@@ -755,14 +745,7 @@ function MdDialogProvider($$interimElementProvider) {
          * If we find no actions at all, log a warning to the console.
          */
         function findCloseButton() {
-          var closeButton = element[0].querySelector('.dialog-close');
-
-          if (!closeButton) {
-            var actionButtons = element[0].querySelectorAll('.md-actions button, md-dialog-actions button');
-            closeButton = actionButtons[actionButtons.length - 1];
-          }
-
-          return closeButton;
+          return element[0].querySelector('.dialog-close, md-dialog-actions button:last-child');
         }
       }
     }

src/components/dialog/dialog.scss

@@ -80,7 +80,7 @@ md-dialog {
     }
   }
 
-  .md-actions, md-dialog-actions {
+  md-dialog-actions {
     display: flex;
     order: 2;
     box-sizing: border-box;
@@ -100,7 +100,7 @@ md-dialog {
     }
   }
   &.md-content-overflow {
-    .md-actions, md-dialog-actions {
+    md-dialog-actions {
       border-top-width: 1px;
       border-top-style: solid;
     }

src/components/dialog/dialog.spec.js

@@ -1197,25 +1197,6 @@ describe('$mdDialog', function() {
       expect($document.activeElement).toBe(parent[0].querySelector('#focus-target'));
     }));
 
-    it('should warn if the deprecated .md-actions class is used', inject(function($mdDialog, $rootScope, $log, $timeout) {
-       spyOn($log, 'warn');
-
-      var parent = angular.element('<div>');
-      $mdDialog.show({
-        template:
-          '<md-dialog>' +
-            '<div class="md-actions">' +
-              '<button class="md-button">Ok good</button>' +
-            '</div>' +
-          '</md-dialog>',
-        parent: parent
-      });
-
-      runAnimation();
-
-      expect($log.warn).toHaveBeenCalled();
-    }));
-
     it('should only allow one open at a time', inject(function($mdDialog, $rootScope, $animate) {
       var parent = angular.element('<div>');
       $mdDialog.show({