Remove fieldtrial testing config entry for AndroidGooglePasswordManager

This is no longer active.

Bug: 903249
Change-Id: Iaf30dfacc0e6216935aee86266e2716da6958a18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1916819Reviewed-by: Jesse Doherty <jwd@chromium.org>
Commit-Queue: Ioana Pandele <ioanap@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715635}

testing/variations/fieldtrial_testing_config.json

@@ -194,24 +194,6 @@
             ]
         }
     ],
-    "AndroidGooglePasswordManager": [
-        {
-            "platforms": [
-                "android"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "params": {
-                        "min-google-play-services-version": "14700000"
-                    },
-                    "enable_features": [
-                        "google-password-manager"
-                    ]
-                }
-            ]
-        }
-    ],
     "AndroidInProductHelpContextualSearchPromotePanelOpen": [
         {
             "platforms": [