Clean up unnecessary spy context statements

Remove spy context syntax because we do not need to
mock context anymore in the test cases.

Bug: 117644158
Test: robotests
Change-Id: I222eec4fbc1994d7bb79adead40b76ac0a000bdc

tests/robotests/src/com/android/settings/location/LocationSliceBuilderTest.java

@@ -2,8 +2,6 @@ package com.android.settings.location;
 
 import static com.google.common.truth.Truth.assertThat;
 
-import static org.mockito.Mockito.spy;
-
 import android.content.Context;
 
 import androidx.core.graphics.drawable.IconCompat;
@@ -32,7 +30,7 @@ public class LocationSliceBuilderTest {
 
     @Before
     public void setUp() {
-        mContext = spy(RuntimeEnvironment.application);
+        mContext = RuntimeEnvironment.application;
 
         // Set-up specs for SliceMetadata.
         SliceProvider.setSpecs(SliceLiveData.SUPPORTED_SPECS);