Remove one more nature

I missed the feature project in my last cleanup.

Author: Bananeweizen

net.sf.eclipsecs-feature/.project

@@ -18,7 +18,6 @@
 	</buildSpec>
 	<natures>
 		<nature>org.eclipse.m2e.core.maven2Nature</nature>
-		<nature>org.maven.ide.eclipse.maven2Nature</nature>
 		<nature>org.eclipse.pde.FeatureNature</nature>
 	</natures>
 </projectDescription>