Remove unused imports.

Author: micahstairs

src/test/java/com/google/firebase/auth/TenantAwareFirebaseAuthIT.java

@@ -35,31 +35,19 @@
 import com.google.api.core.ApiFuture;
 import com.google.api.core.ApiFutureCallback;
 import com.google.api.core.ApiFutures;
-import com.google.auth.ServiceAccountSigner;
-import com.google.auth.oauth2.AccessToken;
 import com.google.auth.oauth2.GoogleCredentials;
-import com.google.common.base.Strings;
-import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
-import com.google.common.io.BaseEncoding;
 import com.google.common.util.concurrent.MoreExecutors;
 import com.google.firebase.FirebaseApp;
-import com.google.firebase.FirebaseOptions;
-import com.google.firebase.ImplFirebaseTrampolines;
-import com.google.firebase.auth.hash.Scrypt;
 import com.google.firebase.internal.Nullable;
 import com.google.firebase.testing.IntegrationTestUtils;
 import java.io.IOException;
-import java.net.URLDecoder;
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import java.util.Random;
 import java.util.UUID;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Semaphore;
-import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicReference;