Remove redundant Maven plugin declarations from sub-modules

Change-Id: I2aa1b2e2e08108deec051594ca8ac3992e271f0f
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.packaging/org.eclipse.jgit.feature/pom.xml

@@ -66,24 +66,4 @@
     </dependency>
   </dependencies>
 
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.sonatype.tycho</groupId>
-        <artifactId>tycho-maven-plugin</artifactId>
-        <version>${tycho-version}</version>
-        <extensions>true</extensions>
-      </plugin>
-      <plugin>
-        <groupId>org.sonatype.tycho</groupId>
-        <artifactId>target-platform-configuration</artifactId>
-        <version>${tycho-version}</version>
-        <configuration>
-          <resolver>p2</resolver>
-	  <pomDependencies>consider</pomDependencies>
-	</configuration>
-      </plugin>
-    </plugins>
-  </build>
-
 </project>

org.eclipse.jgit.packaging/org.eclipse.jgit.updatesite/pom.xml

@@ -68,15 +68,6 @@
 
   <build>
     <plugins>
-      <plugin>
-        <groupId>org.codehaus.tycho</groupId>
-        <artifactId>target-platform-configuration</artifactId>
-        <version>${tycho-version}</version>
-        <configuration>
-          <resolver>p2</resolver>
-          <pomDependencies>consider</pomDependencies>
-        </configuration>
-      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-assembly-plugin</artifactId>