Remove unused imports

Change-Id: I72c566bd076bf6d37bc98c4ff99337b2d1d8eaa1
diff --git a/src/main/java/com/android/tools/r8/features/ClassToFeatureSplitMap.java b/src/main/java/com/android/tools/r8/features/ClassToFeatureSplitMap.java
index 7fa12ce..641d201 100644
--- a/src/main/java/com/android/tools/r8/features/ClassToFeatureSplitMap.java
+++ b/src/main/java/com/android/tools/r8/features/ClassToFeatureSplitMap.java
@@ -8,7 +8,6 @@
 import com.android.tools.r8.ProgramResource;
 import com.android.tools.r8.ProgramResourceProvider;
 import com.android.tools.r8.ResourceException;
-import com.android.tools.r8.graph.AppInfoWithClassHierarchy;
 import com.android.tools.r8.graph.AppView;
 import com.android.tools.r8.graph.DexItemFactory;
 import com.android.tools.r8.graph.DexProgramClass;
diff --git a/src/main/java/com/android/tools/r8/graph/AppInfo.java b/src/main/java/com/android/tools/r8/graph/AppInfo.java
index 41551f4..1cf6ae7 100644
--- a/src/main/java/com/android/tools/r8/graph/AppInfo.java
+++ b/src/main/java/com/android/tools/r8/graph/AppInfo.java
@@ -3,7 +3,6 @@
 // BSD-style license that can be found in the LICENSE file.
 package com.android.tools.r8.graph;
 
-import com.android.tools.r8.FeatureSplit;
 import com.android.tools.r8.graph.FieldResolutionResult.SuccessfulFieldResolutionResult;
 import com.android.tools.r8.ir.desugar.itf.InterfaceMethodRewriter;
 import com.android.tools.r8.origin.Origin;
@@ -13,7 +12,6 @@
 import com.android.tools.r8.synthesis.SyntheticItems;
 import com.android.tools.r8.utils.BooleanBox;
 import com.android.tools.r8.utils.InternalOptions;
-import com.android.tools.r8.utils.IterableUtils;
 import java.util.List;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
diff --git a/src/main/java/com/android/tools/r8/graph/AppInfoWithClassHierarchy.java b/src/main/java/com/android/tools/r8/graph/AppInfoWithClassHierarchy.java
index 9aa49f7..c928847 100644
--- a/src/main/java/com/android/tools/r8/graph/AppInfoWithClassHierarchy.java
+++ b/src/main/java/com/android/tools/r8/graph/AppInfoWithClassHierarchy.java
@@ -7,7 +7,6 @@
 import static com.android.tools.r8.utils.TraversalContinuation.BREAK;
 import static com.android.tools.r8.utils.TraversalContinuation.CONTINUE;
 
-import com.android.tools.r8.FeatureSplit;
 import com.android.tools.r8.features.ClassToFeatureSplitMap;
 import com.android.tools.r8.graph.FieldResolutionResult.SuccessfulFieldResolutionResult;
 import com.android.tools.r8.graph.MethodResolutionResult.ArrayCloneMethodResult;
diff --git a/src/main/java/com/android/tools/r8/ir/conversion/IRConverter.java b/src/main/java/com/android/tools/r8/ir/conversion/IRConverter.java
index 9e2c3a2..047894d 100644
--- a/src/main/java/com/android/tools/r8/ir/conversion/IRConverter.java
+++ b/src/main/java/com/android/tools/r8/ir/conversion/IRConverter.java
@@ -114,7 +114,6 @@
 import com.google.common.base.Suppliers;
 import com.google.common.collect.Sets;
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 import java.util.Set;
diff --git a/src/main/java/com/android/tools/r8/shaking/MissingClasses.java b/src/main/java/com/android/tools/r8/shaking/MissingClasses.java
index b5d7329..5e33712 100644
--- a/src/main/java/com/android/tools/r8/shaking/MissingClasses.java
+++ b/src/main/java/com/android/tools/r8/shaking/MissingClasses.java
@@ -21,7 +21,6 @@
 import com.android.tools.r8.graph.DexType;
 import com.android.tools.r8.graph.ProgramDerivedContext;
 import com.android.tools.r8.graph.ProgramMethod;
-import com.android.tools.r8.synthesis.CommittedItems;
 import com.android.tools.r8.synthesis.SyntheticItems.SynthesizingContextOracle;
 import com.android.tools.r8.utils.SetUtils;
 import com.google.common.collect.ImmutableSet;