Remove relativeOutputPath parameter from getFileSystem.

PiperOrigin-RevId: 239257913
diff --git a/src/main/java/com/google/devtools/build/lib/runtime/BazelFileSystemModule.java b/src/main/java/com/google/devtools/build/lib/runtime/BazelFileSystemModule.java
index 15fadfd..ef23dc7 100644
--- a/src/main/java/com/google/devtools/build/lib/runtime/BazelFileSystemModule.java
+++ b/src/main/java/com/google/devtools/build/lib/runtime/BazelFileSystemModule.java
@@ -63,7 +63,7 @@
 
   @Override
   public ModuleFileSystem getFileSystem(
-      OptionsParsingResult startupOptions, PathFragment realExecRootBase, String relativeOutputPath)
+      OptionsParsingResult startupOptions, PathFragment realExecRootBase)
       throws DefaultHashFunctionNotSetException {
     if ("0".equals(System.getProperty("io.bazel.EnableJni"))) {
       // Ignore UnixFileSystem, to be used for bootstrapping.