Revert "[CQ] Temporarily make node bot experimental"

This reverts commit 3c87d28b.

Reason for revert: Offending test was disabled.

Original change's description:
> [CQ] Temporarily make node bot experimental
> 
> TBR=yangguo@chromium.org
> NOTRY=true
> 
> Bug: v8:8027
> Change-Id: I3d4383dc4e2c0af25d4e51aba4f4d6695030248c
> Reviewed-on: https://chromium-review.googlesource.com/1166823
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54956}

TBR=machenbach@chromium.org,yangguo@chromium.org

Change-Id: I7d7620fc3a8049176e2eab355b65c32d7d06cd77
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:8027
Reviewed-on: https://chromium-review.googlesource.com/1166942Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54960}

infra/config/cq.cfg

@@ -91,10 +91,7 @@ verifiers {
         name: "v8_mac64_rel_ng_triggered"
         triggered_by: "v8_mac64_rel_ng"
       }
-      builders {
-        name: "v8_node_linux64_rel"
-        experiment_percentage: 100
-      }
+      builders { name: "v8_node_linux64_rel" }
       builders { name: "v8_presubmit" }
       builders { name: "v8_win64_msvc_compile_rel" }
       builders { name: "v8_win64_rel_ng" }