remove reference to org.springsource.ide.eclipse.gradle.core.nature

Author: volker

.project

@@ -18,7 +18,6 @@
 	</buildSpec>
 	<natures>
 		<nature>org.eclipse.jdt.core.javanature</nature>
-		<nature>org.springsource.ide.eclipse.gradle.core.nature</nature>
 		<nature>org.eclipse.buildship.core.gradleprojectnature</nature>
 	</natures>
 </projectDescription>