Remove file name from File C++ structure. It is not used.

runtime/bin/file_android.cc

Index: runtime/bin/file_android.cc
diff --git a/runtime/bin/file_android.cc b/runtime/bin/file_android.cc
index a6f04d48fa3a17ac0cfc58e48644ad49b44e71ba..77665e6f8c0639e1f48c0ebe7ff34e499cc4ab41 100644
--- a/runtime/bin/file_android.cc
+++ b/runtime/bin/file_android.cc
@@ -125,13 +125,13 @@ File* File::Open(const char* name, FileOpenMode mode) {
       return NULL;
     }
   }
-  return new File(name, new FileHandle(fd));
+  return new File(new FileHandle(fd));
 }
 
 
 File* File::OpenStdio(int fd) {
   if (fd < 0 || 2 < fd) return NULL;
-  return new File(NULL, new FileHandle(fd));
+  return new File(new FileHandle(fd));
 }