Revert "Add GeoLanguage in fieldtrial testing"

This reverts commit 60fffac6.

Reason for revert: Causing failures in the linux dbg testers (32 and 64)
https://ci.chromium.org/buildbot/chromium.linux/Linux%20Tests%20(dbg)(1)(32)/46826
https://ci.chromium.org/buildbot/chromium.linux/Linux%20Tests%20(dbg)(1)/69081

Original change's description:
> Add GeoLanguage in fieldtrial testing
> 
> 
> 
> Bug: 76915
> Change-Id: Ia0f05256c85eb67daae13c20b96a067a06cfb2ba
> Reviewed-on: https://chromium-review.googlesource.com/816574
> Commit-Queue: Renjie Liu <renjieliu@chromium.org>
> Reviewed-by: Steven Holte <holte@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#525216}

TBR=holte@chromium.org,renjieliu@chromium.org,amoylan@chromium.org

Change-Id: Ie6e9eef0f4b7266eda44d14b3a70ef580103d430
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 76915
Reviewed-on: https://chromium-review.googlesource.com/835808Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#525276}

testing/variations/fieldtrial_testing_config.json

@@ -1497,25 +1497,6 @@
             ]
         }
     ],
-    "GeoLanguage": [
-        {
-            "platforms": [
-                "android",
-                "chromeos",
-                "linux",
-                "mac",
-                "win"
-            ],
-            "experiments": [
-                {
-                    "name": "GeoLanguage",
-                    "enable_features": [
-                        "GeoLanguage"
-                    ]
-                }
-            ]
-        }
-    ],
     "GoogleBrandedContextMenu": [
         {
             "platforms": [