get rid of dead code

GitOrigin-RevId: 16bc993d3c3c2759ac6ce7a3fbbb1bb82026de66

platform/lang-impl/src/com/intellij/ide/favoritesTreeView/FavoritesManager.java

@@ -164,12 +164,11 @@ public final class FavoritesManager implements ProjectComponent, JDOMExternaliza
     return myViewSettings;
   }
 
-  public synchronized boolean removeFavoritesList(@NotNull String name) {
-    boolean result = myName2FavoritesRoots.remove(name) != null;
+  public synchronized void removeFavoritesList(@NotNull String name) {
+    myName2FavoritesRoots.remove(name);
     myFavoritesRootsOrder.remove(name);
     myDescriptions.remove(name);
     listRemoved(name);
-    return result;
   }
 
   @NotNull
@@ -467,7 +466,7 @@ public final class FavoritesManager implements ProjectComponent, JDOMExternaliza
     final ProjectFileIndex projectFileIndex = ProjectRootManager.getInstance(myProject).getFileIndex();
     final Set<Boolean> find = new HashSet<>();
     final ContentIterator contentIterator = fileOrDir -> {
-      if (fileOrDir != null && fileOrDir.getPath().equals(vFile.getPath())) {
+      if (fileOrDir.getPath().equals(vFile.getPath())) {
         find.add(Boolean.TRUE);
       }
       return true;

platform/util/ui/src/com/intellij/openapi/ui/InvariantIcon.java

@@ -1,29 +0,0 @@
-// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
-package com.intellij.openapi.ui;
-
-import com.intellij.openapi.util.Condition;
-
-import javax.swing.*;
-import java.awt.*;
-
-/**
- * @author Konstantin Bulenkov
- */
-public class InvariantIcon implements Icon {
-  public InvariantIcon(Icon base, Icon optional, Condition condition) {
-  }
-
-  @Override
-  public void paintIcon(Component c, Graphics g, int x, int y) {
-  }
-
-  @Override
-  public int getIconWidth() {
-    return 0;
-  }
-
-  @Override
-  public int getIconHeight() {
-    return 0;
-  }
-}

platform/util/ui/src/com/intellij/openapi/ui/NullableComponent.java

@@ -9,9 +9,6 @@ public interface NullableComponent {
   boolean isNull();
 
   class Check {
-    private Check() {
-    }
-
     public static boolean isNull(Component c) {
       return c == null || c instanceof NullableComponent && ((NullableComponent)c).isNull();
     }
@@ -19,9 +16,5 @@ public interface NullableComponent {
     public static boolean isNullOrHidden(Component c) {
       return c != null && !c.isShowing() || isNull(c);
     }
-
-    public static boolean isNotNullAndVisible(Component c) {
-      return !isNull(c) && c.isVisible();
-    }
   }
 }

platform/util/ui/src/com/intellij/openapi/util/IdRunnable.java

@@ -1,15 +0,0 @@
-// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
-package com.intellij.openapi.util;
-
-import com.intellij.util.ui.update.ComparableObject;
-
-public abstract class IdRunnable extends ComparableObject.Impl implements Runnable {
-
-  public IdRunnable(Object object) {
-    super(object);
-  }
-
-  public IdRunnable(Object[] objects) {
-    super(objects);
-  }
-}