Kill load_file.

Change-Id: I6c332f7d8e94d513605295b3d4d32c4e1cf878dc
diff --git a/adb/adb_utils.h b/adb/adb_utils.h
index 3daef52..06ede07 100644
--- a/adb/adb_utils.h
+++ b/adb/adb_utils.h
@@ -66,6 +66,7 @@
 
 using unique_fd = android::base::unique_fd_impl<AdbCloser>;
 
+// TODO: switch remaining users over to unique_fd...
 class ScopedFd {
   public:
     ScopedFd() {