FenceUnregister.java

Awareness.FenceApi.updateFences(
                mGoogleApiClient,
                new FenceUpdateRequest.Builder()
                        .removeFence(FENCE_KEY)
                        .build()).setResultCallback(new ResultCallbacks<Status>() {
            @Override
            public void onSuccess(@NonNull Status status) {
                // Fence removed!
            }

            @Override
            public void onFailure(@NonNull Status status) {
                // Oops, the fence wasn't removed...
            }
        });