1 files changed, 5 insertions, 4 deletions
diff --git a/guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ImmutableCollection.java b/guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ImmutableCollection.java
index ee93d9b1f..93fc4bd24 100644
--- a/guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ImmutableCollection.java
+++ b/guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ImmutableCollection.java
@@ -22,9 +22,9 @@ import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import java.io.Serializable;
 import java.util.AbstractCollection;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.Iterator;
 import java.util.Spliterator;
+import java.util.function.Predicate;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
@@ -37,9 +37,6 @@ public abstract class ImmutableCollection<E> extends AbstractCollection<E> imple
   static final int SPLITERATOR_CHARACTERISTICS =
       Spliterator.IMMUTABLE | Spliterator.NONNULL | Spliterator.ORDERED;
 
-  static final ImmutableCollection<Object> EMPTY_IMMUTABLE_COLLECTION =
-      new ForwardingImmutableCollection<Object>(Collections.emptyList());
-
   ImmutableCollection() {}
 
   public abstract UnmodifiableIterator<E> iterator();
@@ -64,6 +61,10 @@ public abstract class ImmutableCollection<E> extends AbstractCollection<E> imple
     throw new UnsupportedOperationException();
   }
 
+  public final boolean removeIf(Predicate<? super E> predicate) {
+    throw new UnsupportedOperationException();
+  }
+
   public final boolean retainAll(Collection<?> elementsToKeep) {
     throw new UnsupportedOperationException();
   }