Remove unused fakeCompilerVersion from R8Command

Change-Id: I7bb4d14f2bd040d4cd4f4b3872bbfa532e0f2899
diff --git a/src/main/java/com/android/tools/r8/R8Command.java b/src/main/java/com/android/tools/r8/R8Command.java
index ee35e7f..6118b88 100644
--- a/src/main/java/com/android/tools/r8/R8Command.java
+++ b/src/main/java/com/android/tools/r8/R8Command.java
@@ -658,8 +658,7 @@
               getAndroidPlatformBuild(),
               getArtProfilesForRewriting(),
               getStartupProfileProviders(),
-              getClassConflictResolver(),
-              fakeCompilerVersion);
+              getClassConflictResolver());
 
       if (inputDependencyGraphConsumer != null) {
         inputDependencyGraphConsumer.finished();
@@ -846,7 +845,6 @@
   private final FeatureSplitConfiguration featureSplitConfiguration;
   private final String synthesizedClassPrefix;
   private final boolean enableMissingLibraryApiModeling;
-  private final SemanticVersion fakeCompilerVersion;
 
   /** Get a new {@link R8Command.Builder}. */
   public static Builder builder() {
@@ -939,8 +937,7 @@
       boolean isAndroidPlatformBuild,
       List<ArtProfileForRewriting> artProfilesForRewriting,
       List<StartupProfileProvider> startupProfileProviders,
-      ClassConflictResolver classConflictResolver,
-      SemanticVersion fakeCompilerVersion) {
+      ClassConflictResolver classConflictResolver) {
     super(
         inputApp,
         mode,
@@ -983,7 +980,6 @@
     this.featureSplitConfiguration = featureSplitConfiguration;
     this.synthesizedClassPrefix = synthesizedClassPrefix;
     this.enableMissingLibraryApiModeling = enableMissingLibraryApiModeling;
-    this.fakeCompilerVersion = fakeCompilerVersion;
   }
 
   private R8Command(boolean printHelp, boolean printVersion) {
@@ -1007,7 +1003,6 @@
     featureSplitConfiguration = null;
     synthesizedClassPrefix = null;
     enableMissingLibraryApiModeling = false;
-    fakeCompilerVersion = null;
   }
 
   public DexItemFactory getDexItemFactory() {