Format some imports using fix_imports.py

Unfortunately this tool isn't smart enough to deal with the assertThat
situation (which has two static imports of a function with the same name).

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=172000753

java/google/registry/rde/PendingDeposit.java

@@ -18,7 +18,6 @@ import com.google.auto.value.AutoValue;
 import google.registry.model.common.Cursor.CursorType;
 import google.registry.model.rde.RdeMode;
 import java.io.Serializable;
-import java.util.Optional;
 import javax.annotation.Nullable;
 import org.joda.time.DateTime;
 import org.joda.time.Duration;