Make the PhabricatorApplication::getName() method abstract

Summary: In D10027, the `getName()` method was added to `PhabricatorApplication` to //allow// applications to explicitly declare their names rather than relying on the name being inferred from the name of the `PhabricatorApplication` subclass. I feel that sufficient time has passed such that we can //require// applications to explicitly declare their names.

Test Plan: N/A

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D11119

src/applications/base/PhabricatorApplication.php

@@ -28,23 +28,7 @@ abstract class PhabricatorApplication implements PhabricatorPolicyInterface {
 
 /* -(  Application Information  )-------------------------------------------- */
 
-
+  public abstract function getName();
-  /**
-   * TODO: This should be abstract, but is not for historical reasons.
-   */
-  public function getName() {
-    phutil_deprecated(
-      'Automatic naming of `PhabricatorApplication` classes.',
-      'You should override the `getName` method.');
-
-    $match = null;
-    $regex = '/^PhabricatorApplication([A-Z][a-zA-Z]*)$/';
-    if (preg_match($regex, get_class($this), $match)) {
-      return $match[1];
-    }
-
-    throw new PhutilMethodNotImplementedException();
-  }
 
   public function getShortDescription() {
     return $this->getName().' Application';