[swarming] Remove non CIPD managed luci-go package

Bug: 851596
Change-Id: I834ccae440b5590525644e4ad9e9d3c952038547
Reviewed-on: https://chromium-review.googlesource.com/c/1364976
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Marc-Antoine Ruel <maruel@chromium.org>
Reviewed-by: Marc-Antoine Ruel <maruel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614359}

DEPS

@@ -2262,44 +2262,6 @@ hooks = [
                 '-d', 'src/chrome/build',
     ],
   },
-  # Pull luci-go binaries (isolate, swarming) using checked-in hashes.
-  # TODO(maruel): Remove, https://crbug.com/851596
-  {
-    'name': 'luci-go_win',
-    'pattern': '.',
-    'condition': 'host_os == "win"',
-    'action': [ 'python',
-                'src/third_party/depot_tools/download_from_google_storage.py',
-                '--no_resume',
-                '--no_auth',
-                '--bucket', 'chromium-luci',
-                '-d', 'src/tools/luci-go/win64',
-    ],
-  },
-  {
-    'name': 'luci-go_mac',
-    'pattern': '.',
-    'condition': 'host_os == "mac"',
-    'action': [ 'python',
-                'src/third_party/depot_tools/download_from_google_storage.py',
-                '--no_resume',
-                '--no_auth',
-                '--bucket', 'chromium-luci',
-                '-d', 'src/tools/luci-go/mac64',
-    ],
-  },
-  {
-    'name': 'luci-go_linux',
-    'pattern': '.',
-    'condition': 'host_os == "linux"',
-    'action': [ 'python',
-                'src/third_party/depot_tools/download_from_google_storage.py',
-                '--no_resume',
-                '--no_auth',
-                '--bucket', 'chromium-luci',
-                '-d', 'src/tools/luci-go/linux64',
-    ],
-  },
   {
     'name': 'apache_win32',
     'pattern': '\\.sha1',

tools/luci-go/.gitignore

@@ -1,10 +1,7 @@
+/.versions
 /isolate
 /isolate.exe
 /isolated
 /isolated.exe
-/linux64/isolate
-/mac64/isolate
 /swarming
 /swarming.exe
-/win64/isolate.exe
-.versions