Fixing gRPC related poms

Change-Id: Id74b8db40b2a1693ec29fb73f8be2fd802241bb7
diff --git a/incubator/protobuf/pom.xml b/incubator/protobuf/pom.xml
index 5d2c530..ece47ab 100644
--- a/incubator/protobuf/pom.xml
+++ b/incubator/protobuf/pom.xml
@@ -16,18 +16,6 @@
   -->
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
     <parent>
         <artifactId>onos-incubator-grpc-dependencies</artifactId>
         <groupId>org.onosproject</groupId>
@@ -66,20 +54,11 @@
             <scope>provided</scope>
         </dependency>
 
-        <dependency>
-            <groupId>org.onosproject</groupId>
-            <artifactId>onos-incubator-api</artifactId>
-            <version>${project.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.osgi</groupId>
-            <artifactId>org.osgi.compendium</artifactId>
-            <scope>compile</scope>
-        </dependency>
-
     </dependencies>
 
     <modules>
+        <module>api</module>
+        <module>registry</module>
         <module>models</module>
         <module>services</module>
     </modules>