[R-Project] Adapt to changed AbstractProjectNature

Change-Id: I1049d626f63d047db457706a096bcd31812b0a2b
diff --git a/r/org.eclipse.statet.r.core/src/org/eclipse/statet/internal/r/core/RProjectNature.java b/r/org.eclipse.statet.r.core/src/org/eclipse/statet/internal/r/core/RProjectNature.java
index 2418e0d..d061ade 100644
--- a/r/org.eclipse.statet.r.core/src/org/eclipse/statet/internal/r/core/RProjectNature.java
+++ b/r/org.eclipse.statet.r.core/src/org/eclipse/statet/internal/r/core/RProjectNature.java
@@ -135,12 +135,6 @@
 	}
 	
 	@Override
-	public void deconfigure() throws CoreException {
-		dispose();
-		super.deconfigure();
-	}
-	
-	@Override
 	public void addBuilders() throws CoreException {
 		final IProject project= getProject();
 		final IProjectDescription description= project.getDescription();