Remove .bak files, probably committed by mistake

R=dpranke@chromium.org

Change-Id: I25bf5c2b3c64649a7cfa49481a4a9e3a0d20a58f
Reviewed-on: https://chromium-review.googlesource.com/941205
Commit-Queue: Yngve Pettersen <yngve@vivaldi.com>
Reviewed-by: Tomasz Mikolajewski <mtomasz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541983}

chrome/test/data/extensions/api_test/file_system_provider/configure/manifest.json.bak

-{
-  // chrome-extension://pkplfbidichfdicaijlchgnapepdginl
-  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtDfX9dHNh948bt00YhZBm3P6E5QLaOt+v8kXVtibQfiPtOD2FTScB/f0wX/EQWVO7BkaSOsRkTPcPIgocyMPYr2FLgqGLFlYT9nQpKJZUFNF5oJ5rG6Nv7ppf4zEB3j6da1IBRTz2yOZ+6O1TMZxol/V62/QcqrJeggsHTEPGLdr9Ua4b1Ka0xKJnJngZljsbw93FI1o+P9dAh5BS6wTPiZI/vmJVjvMTkSTnaZ3n9Go2t7A0XLcSxLcVyuLAd2mAvSN0mIviOukdM66wr7llif71nKuUt+4qvlr/r9HfwzN6pA4jkwhtS1UD+3CmB+wsHwsnohNcuu4FIQ6rgq/7QIDAQAB",
-  "name": "chrome.fileSystemProvider.onAddWatcherRequested",
-  "version": "0.1",
-  "manifest_version": 2,
-  "description":
-      "Test for chrome.fileSystemProvider.onAddWatcherRequested().",
-  "permissions": [
-    "fileSystemProvider",
-    {
-      "fileSystem": ["requestFileSystem", "write"]
-    },
-    "fileManagerPrivate",
-    "fileBrowserHandler"
-  ],
-  "app": {
-    "background": {
-      "scripts": [
-        "chrome-extension://gfnblenhaahcnmfdbebgincjohfkbnch/test_util.js",
-        "test.js"
-      ]
-    }
-  }
-}

chrome/test/data/page_cycler/cached_data_dir/Default/Bookmarks.bak

-{
-   "checksum": "942764d02172e0ac56471532a4f3f57c",
-   "roots": {
-      "bookmark_bar": {
-         "children": [  ],
-         "date_added": "12978575074515810",
-         "date_modified": "0",
-         "id": "1",
-         "name": "Bookmarks Bar",
-         "type": "folder"
-      },
-      "other": {
-         "children": [  ],
-         "date_added": "12978575074515840",
-         "date_modified": "0",
-         "id": "2",
-         "name": "Other Bookmarks",
-         "type": "folder"
-      },
-      "synced": {
-         "children": [  ],
-         "date_added": "12978575074515852",
-         "date_modified": "0",
-         "id": "3",
-         "name": "Mobile Bookmarks",
-         "type": "folder"
-      }
-   },
-   "version": 1
-}