remove unused import

Author: noahdietz

gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/resourcename/ResourceNameHelperClassComposerTest.java

@@ -31,7 +31,6 @@
 import com.google.logging.v2.LoggingConfigProto;
 import com.google.logging.v2.LoggingMetricsProto;
 import com.google.logging.v2.LoggingProto;
-import com.google.protobuf.Empty;
 import com.google.protobuf.EmptyProto;
 import com.google.protobuf.Descriptors.FileDescriptor;
 import com.google.protobuf.Descriptors.ServiceDescriptor;