Revert "Re-add field trial testing config for DisableLatencyRecoveryDesktop"

This reverts commit 26f4c62b.

Reason for revert: crbug.com/1108303 regressions showing up on a large number of Graphics.Smoothness.PercentDroppedFrames graphs. We should analyze the impact and reland.

Original change's description:
> Re-add field trial testing config for DisableLatencyRecoveryDesktop
> 
> Based on the data gathered from running the experiment on canary/dev and
> beta, it seems that the disabling latency recovery for both main and
> impl threads is an overall performance win. So, we are going to
> re-enable the (now-expired) experiment on stable and move forward with
> its gradual rollout.
> 
> Bug: 993895
> Change-Id: I5c45c3cb469d14cf53193d0af6a560842ce02be2
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2309188
> Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
> Commit-Queue: Mohsen Izadi <mohsen@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#790549}

TBR=mohsen@chromium.org,rkaplow@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 993895
Change-Id: I0409a5a5df03b34c8e4a203482175089dac83e41
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2315014Reviewed-by: Jonathan Ross <jonross@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791293}

testing/variations/fieldtrial_testing_config.json

@@ -2252,25 +2252,6 @@
             ]
         }
     ],
-    "DisableLatencyRecoveryDesktop": [
-        {
-            "platforms": [
-                "chromeos",
-                "linux",
-                "mac",
-                "windows"
-            ],
-            "experiments": [
-                {
-                    "name": "DisabledImplDisabledMain",
-                    "disable_features": [
-                        "ImplLatencyRecovery",
-                        "MainLatencyRecovery"
-                    ]
-                }
-            ]
-        }
-    ],
     "DisableMalwareExtensionsRemotely": [
         {
             "platforms": [