Remove remaining Debug builders/testers from chromium.gpu.

The following bots have been migrated to LUCI:
  GPU Linux Builder (dbg)
  Linux Debug (NVIDIA)
  GPU Win Builder (dbg)
  Win10 Debug (NVIDIA)

Bug: 790065, 790069, 790078, 810318, 815092
Change-Id: I2d6e6c1ea9103c91750127974d0768afa65aa88e
Reviewed-on: https://chromium-review.googlesource.com/1062663Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559283}

infra/config/global/luci-milo.cfg

@@ -1629,16 +1629,6 @@ consoles {
     category: "gpu|win|release|builder"
     short_name: "bb"
   }
-  builders {
-    name: "buildbucket/luci.chromium.ci/GPU Win Builder (dbg)"
-    category: "gpu|win|debug|builder"
-    short_name: "ci"
-  }
-  builders {
-    name: "buildbot/chromium.gpu/GPU Win Builder (dbg)"
-    category: "gpu|win|debug|builder"
-    short_name: "bb"
-  }
   builders {
     name: "buildbucket/luci.chromium.ci/Win10 Release (NVIDIA)"
     category: "gpu|win|release|tester"
@@ -1649,36 +1639,6 @@ consoles {
     category: "gpu|win|release|tester"
     short_name: "bb"
   }
-  builders {
-    name: "buildbucket/luci.chromium.ci/Win10 Debug (NVIDIA)"
-    category: "gpu|win|debug|tester"
-    short_name: "ci"
-  }
-  builders {
-    name: "buildbot/chromium.gpu/Win10 Debug (NVIDIA)"
-    category: "gpu|win|debug|tester"
-    short_name: "bb"
-  }
-  builders {
-    name: "buildbucket/luci.chromium.ci/GPU Linux Builder (dbg)"
-    category: "gpu|linux|debug|builder"
-    short_name: "ci"
-  }
-  builders {
-    name: "buildbot/chromium.gpu/GPU Linux Builder (dbg)"
-    category: "gpu|linux|debug|builder"
-    short_name: "bb"
-  }
-  builders {
-    name: "buildbucket/luci.chromium.ci/Linux Debug (NVIDIA)"
-    category: "gpu|linux|debug|tester"
-    short_name: "ci"
-  }
-  builders {
-    name: "buildbot/chromium.gpu/Linux Debug (NVIDIA)"
-    category: "gpu|linux|debug|tester"
-    short_name: "bb"
-  }
   builders {
     name: "buildbucket/luci.chromium.ci/Android Release (Nexus 5X)"
     category: "gpu|android|release"
@@ -2853,12 +2813,10 @@ consoles {
     category: "Windows"
   }
   builders {
-    name: "buildbot/chromium.gpu/GPU Win Builder (dbg)"
     name: "buildbucket/luci.chromium.ci/GPU Win Builder (dbg)"
     category: "Windows"
   }
   builders {
-    name: "buildbot/chromium.gpu/Win10 Debug (NVIDIA)"
     name: "buildbucket/luci.chromium.ci/Win10 Debug (NVIDIA)"
     category: "Windows"
   }
@@ -2896,12 +2854,10 @@ consoles {
     category: "Linux"
   }
   builders {
-    name: "buildbot/chromium.gpu/GPU Linux Builder (dbg)"
     name: "buildbucket/luci.chromium.ci/GPU Linux Builder (dbg)"
     category: "Linux"
   }
   builders {
-    name: "buildbot/chromium.gpu/Linux Debug (NVIDIA)"
     name: "buildbucket/luci.chromium.ci/Linux Debug (NVIDIA)"
     category: "Linux"
   }