[LUCI] Remove Android x* Builder (dbg) from side-by-side

Flipped LUCI and Buildbot for Android x64 Builder (dbg) and Android
x86 Builder (dbg). Removing them from migration side-by-side UI.

Bug: 790521, 790536
Change-Id: I593f5c76205b1264b81f0851a5e5ff9eac2fed3a
Reviewed-on: https://chromium-review.googlesource.com/990811Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Shenghua Zhang <shenghuazhang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547590}

infra/config/global/luci-milo.cfg

@@ -1504,28 +1504,6 @@ consoles: {
     short_name: "🍕"
   }
 
-  builders: {
-    name: "buildbucket/luci.chromium.ci/Android x64 Builder (dbg)"
-    category: "android|builder|debug|64"
-    short_name: "🐼"
-  }
-  builders: {
-    name: "buildbot/chromium.android/Android x64 Builder (dbg)"
-    category: "android|builder|debug|64"
-    short_name: "🐰"
-  }
-
-  builders: {
-    name: "buildbucket/luci.chromium.ci/Android x86 Builder (dbg)"
-    category: "android|builder|debug|32"
-    short_name: "🐼"
-  }
-  builders: {
-    name: "buildbot/chromium.android/Android x86 Builder (dbg)"
-    category: "android|builder|debug|32"
-    short_name: "🐰"
-  }
-
   builders: {
     name: "buildbucket/luci.chromium.ci/Marshmallow 64 bit Tester"
     category: "android|tester|debug|phone|M"