remove old unused ParameterLookupElement class

Author: Haehnchen

src/fr/adrienbrault/idea/symfony2plugin/dic/ParameterLookupElement.java

@@ -11,7 +11,6 @@
 import com.intellij.util.indexing.FileBasedIndexImpl;
 import fr.adrienbrault.idea.symfony2plugin.Symfony2ProjectComponent;
 import fr.adrienbrault.idea.symfony2plugin.completion.lookup.ContainerTagLookupElement;
-import fr.adrienbrault.idea.symfony2plugin.dic.ParameterLookupElement;
 import fr.adrienbrault.idea.symfony2plugin.dic.XmlTagParser;
 import fr.adrienbrault.idea.symfony2plugin.stubs.SymfonyProcessors;
 import fr.adrienbrault.idea.symfony2plugin.stubs.indexes.ServicesTagStubIndex;