Remove UnidoDeviceExpiration from fieldtrial_testing_config.json

Bug: 1030266
Change-Id: Ic3f173cf51c5bec48b4fc75cf4449590a861c2da
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2064947
Commit-Queue: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743294}

testing/variations/fieldtrial_testing_config.json

@@ -6303,28 +6303,6 @@
             ]
         }
     ],
-    "UnidoDeviceExpiration": [
-        {
-            "platforms": [
-                "android",
-                "chromeos",
-                "linux",
-                "mac",
-                "windows"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled_24",
-                    "params": {
-                        "SharingDeviceExpirationHours": "24"
-                    },
-                    "enable_features": [
-                        "SharingDeviceExpiration"
-                    ]
-                }
-            ]
-        }
-    ],
     "UnidoOnSignInV2": [
         {
             "platforms": [