Remove buildbot builder 'Battor Agent Linux'

Bug: 790422
Change-Id: I491e42ee19d4254caa0d3da1317f38966dd55885
Reviewed-on: https://chromium-review.googlesource.com/1008127Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#549965}

infra/config/global/luci-milo-dev.cfg

@@ -3007,10 +3007,6 @@ consoles: {
     name: "buildbot/chromium.perf.fyi/Android Nexus 5X Perf FYI"
     category: "android"
   }
-  builders: {
-    name: "buildbot/chromium.perf.fyi/Battor Agent Linux"
-    category: "battor"
-  }
   builders: {
     name: "buildbot/chromium.perf.fyi/Battor Agent Mac"
     category: "battor"

infra/config/global/luci-milo.cfg

@@ -3625,10 +3625,6 @@ consoles: {
     name: "buildbot/chromium.perf.fyi/Android Nexus 5X Perf FYI"
     category: "android"
   }
-  builders: {
-    name: "buildbot/chromium.perf.fyi/Battor Agent Linux"
-    category: "battor"
-  }
   builders: {
     name: "buildbot/chromium.perf.fyi/Battor Agent Mac"
     category: "battor"