Remove Android MIPs BB builder

Bug:869249
Change-Id: Ida001cb05e27b6a064d1b3a4ec51cc7bb537845b
Reviewed-on: https://chromium-review.googlesource.com/1179372Reviewed-by: Patrik Höglund <phoglund@chromium.org>
Commit-Queue: Eric Foo <efoo@chromium.org>

infra/config/cq.cfg

@@ -46,10 +46,6 @@ verifiers {
       builders { name: "android_arm64" }
       builders { name: "android_x86" }
       builders { name: "android_x64" }
-      builders {
-        name: "android_mips"
-        experiment_percentage: 100
-      }
     }
   }
 }