Revert of Explicit control in tools of ANGLE frontend and backend

infra/bots/recipes/swarm_test.expected/Test-Win8-MSVC-ShuttleB-GPU-GTX960-x86_64-Debug-ANGLE.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "[SLAVE_BUILD]\\skia\\infra\\bots\\assets\\skp\\VERSION",
       "/path/to/tmp/"
     ],
     "name": "Get downloaded SKP VERSION"
@@ skipping 207 matching lines @@
       "[SLAVE_BUILD]\\tmp\\uninteresting_hashes.txt",
       "--writePath",
       "[CUSTOM_[SWARM_OUT_DIR]]\\dm",
       "--nocpu",
       "--config",
       "8888",
       "gpu",
       "gpusrgb",
       "pdf",
       "msaa16",
-      "angle_gl_es2",
-      "angle_d3d11_es2",
       "serialize-8888",
       "tiles_rt-8888",
       "pic-8888",
       "angle",
       "--src",
       "tests",
       "gm",
       "image",
       "colorImage",
       "svg",
@@ skipping 312 matching lines @@
       "SKIA_OUT": "[SLAVE_BUILD]\\out"
     },
     "name": "dm"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]