deps: remove grpc test dep since it's now in shared-deps (#220)

Author: stephaniewang526

pom.xml

@@ -113,12 +113,6 @@
         <version>4.13</version>
         <scope>test</scope>
       </dependency>
-      <dependency>
-        <groupId>com.google.api.grpc</groupId>
-        <artifactId>grpc-google-iam-v1</artifactId>
-        <version>0.13.0</version>
-        <scope>test</scope>
-      </dependency>
       <dependency>
         <groupId>org.easymock</groupId>
         <artifactId>easymock</artifactId>