Do not compute light files on classpath initialization

 This became useless as we fix behaviour of Kotlin full build which is
called when nature is changing

 #KT-14072 Fixed

Author: zarechenskiy

kotlin-eclipse-core/src/org/jetbrains/kotlin/core/filesystem/KotlinFileSystem.java

@@ -2,15 +2,12 @@
 
 import java.io.File;
 import java.net.URI;
-import java.util.Collections;
 
 import org.eclipse.core.filesystem.IFileStore;
 import org.eclipse.core.filesystem.IFileTree;
 import org.eclipse.core.filesystem.provider.FileSystem;
-import org.eclipse.core.resources.IProject;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
-import org.jetbrains.kotlin.core.asJava.KotlinLightClassGeneration;
 
 public class KotlinFileSystem extends FileSystem {
 
@@ -43,12 +40,6 @@ public static KotlinFileSystem getInstance() {
 
     @Override
     public IFileTree fetchFileTree(IFileStore root, IProgressMonitor monitor) throws CoreException {
-        if (root instanceof KotlinFileStore) {
-            IProject eclipseProject = ((KotlinFileStore) root).getProject();
-            if (eclipseProject != null) {
-                KotlinLightClassGeneration.INSTANCE.updateLightClasses(eclipseProject, Collections.emptySet());
-            }
-        }
         return super.fetchFileTree(root, monitor);
     }
 }