Revert of Add android N5 bot as 10% experimental on CQ. (patchset #3 id:40001...

Revert of Add android N5 bot as 10% experimental on CQ. (patchset #3 id:40001 of https://codereview.chromium.org/980413003/)

Reason for revert:
Experimental bot did it's job. Now it's time to return this bot to the CQ fleet. Here is the Revert CL that will make the android_n5 bot back to a regular CQ bot: https://codereview.chromium.org/1025673003/

Original issue's description:
> Add android N5 bot as 10% experimental on CQ.
>
> BUG=460553
>
> Committed: https://crrev.com/230ec392dae3136340a43236d6a6b3f0afd2d838
> Cr-Commit-Position: refs/heads/master@{#320133}

TBR=phajdan@google.com,friedman@chromium.org,jbudorick@chromium.org,sergiyb@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=460553

Review URL: https://codereview.chromium.org/1028523004

Cr-Commit-Position: refs/heads/master@{#321631}

testing/commit_queue/config.json

@@ -39,9 +39,6 @@
                             "android_amp_rel_tests_recipe": [
                                 "defaulttests"
                             ],
-                            "android_n5_rel_tests_recipe": [
-                                "defaulttests"
-                            ],
                             "cast_shell": [
                                 "defaulttests"
                             ],