Remove compile-time mockito dependency from client module

client/pom.xml

@@ -41,11 +41,6 @@
             <groupId>com.google.gwt</groupId>
             <artifactId>gwt-elemental</artifactId>
         </dependency>
-
-        <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-core</artifactId>
-        </dependency>
     </dependencies>
 
     <build>