Remove ToTMac{, (dbg),ASan,Coverage} Buildbot builders from console

Bug: 868213
Change-Id: Id4b43008fb3078052d75ff020f0cc10c1e475099
Reviewed-on: https://chromium-review.googlesource.com/c/1490014
Commit-Queue: Eric Foo <efoo@chromium.org>
Commit-Queue: Ryan Tseng <hinoka@chromium.org>
Auto-Submit: Eric Foo <efoo@chromium.org>
Reviewed-by: Ryan Tseng <hinoka@chromium.org>
Cr-Commit-Position: refs/heads/master@{#635743}

infra/config/luci-milo.cfg

@@ -1926,19 +1926,16 @@ consoles {
     short_name: "off"
   }
   builders {
-    name: "buildbot/chromium.clang/ToTMac"
     name: "buildbucket/luci.chromium.ci/ToTMac"
     category: "ToT Mac"
     short_name: "rel"
   }
   builders {
-    name: "buildbot/chromium.clang/ToTMac (dbg)"
     name: "buildbucket/luci.chromium.ci/ToTMac (dbg)"
     category: "ToT Mac"
     short_name: "dbg"
   }
   builders {
-    name: "buildbot/chromium.clang/ToTMacASan"
     name: "buildbucket/luci.chromium.ci/ToTMacASan"
     category: "ToT Mac"
     short_name: "asn"
@@ -2016,7 +2013,6 @@ consoles {
     short_name: "linux"
   }
   builders {
-    name: "buildbot/chromium.clang/ToTMacCoverage"
     name: "buildbucket/luci.chromium.ci/ToTMacCoverage"
     category: "ToT Code Coverage"
     short_name: "mac"