Move files in Phabricator one level up

Summary:
- `kill_init.php` said "Moving 1000 files" - I hope that this is not some limit in `FileFinder`.
- [src/infrastructure/celerity] `git mv utils.php map.php; git mv api/utils.php api.php`
- Comment `phutil_libraries` in `.arcconfig` and run `arc liberate`.

NOTE: `arc diff` timed out so I'm pushing it without review.

Test Plan:
/D1234
Browsed around, especially in `applications/repository/worker/commitchangeparser` and `applications/` in general.

Auditors: epriestley

Maniphest Tasks: T1103

src/applications/files/controller/PhabricatorFileDeleteController.php

@@ -0,0 +1,60 @@
+<?php
+
+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class PhabricatorFileDeleteController extends PhabricatorFileController {
+
+  private $id;
+
+  public function willProcessRequest(array $data) {
+    $this->id = $data['id'];
+  }
+
+  public function processRequest() {
+
+    $request = $this->getRequest();
+    $user = $request->getUser();
+
+    $file = id(new PhabricatorFile())->loadOneWhere(
+      'id = %d',
+      $this->id);
+    if (!$file) {
+      return new Aphront404Response();
+    }
+
+    if (($user->getPHID() != $file->getAuthorPHID()) &&
+        (!$user->getIsAdmin())) {
+      return new Aphront403Response();
+    }
+
+    if ($request->isFormPost()) {
+      $file->delete();
+      return id(new AphrontRedirectResponse())->setURI('/file/');
+    }
+
+    $dialog = new AphrontDialogView();
+    $dialog->setUser($user);
+    $dialog->setTitle('Really delete file?');
+    $dialog->appendChild(
+      "<p>Permanently delete '".phutil_escape_html($file->getName())."'? This ".
+      "action can not be undone.");
+    $dialog->addSubmitButton('Delete');
+    $dialog->addCancelButton($file->getInfoURI());
+
+    return id(new AphrontDialogResponse())->setDialog($dialog);
+  }
+}