[CQ] Remove avx2 bots from CQ

NOTRY=true
TBR=sergiyb@chromium.org

Bug: chromium:782226
Change-Id: I7a059f3227e062df720a36cd47db94154caf40b5
Reviewed-on: https://chromium-review.googlesource.com/758264Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49223}

infra/config/cq.cfg

@@ -41,11 +41,6 @@ verifiers {
         name: "v8_linux64_asan_rel_ng_triggered"
         triggered_by: "v8_linux64_asan_rel_ng"
       }
-      builders { name: "v8_linux64_avx2_rel_ng" }
-      builders {
-        name: "v8_linux64_avx2_rel_ng_triggered"
-        triggered_by: "v8_linux64_avx2_rel_ng"
-      }
       builders { name: "v8_linux64_gcc_compile_dbg" }
       builders { name: "v8_linux64_gyp_rel_ng" }
       builders {