Remove unused gradle configurations from uc3 and uc4 subproject

uc3 and uc4 had still some unnecassary configurations that are not needed, because they are already configured in the root project. This configuration may confuse developers.

uc3-application/build.gradle

-allprojects {
-	repositories {
-    	maven {
-    		url 'https://packages.confluent.io/maven/'
-    	}
-	}
-}
-
-dependencies {
-    compile('org.industrial-devops:titan-ccp-common-kafka:0.1.0-SNAPSHOT')
-}
-
 mainClassName = "theodolite.uc3.application.HistoryService"