[vm/riscv] Remove accidental __ to unbreak the build.
[vm/riscv] Remove accidental __ to unbreak the build.

TEST=ci

Change-Id: I084cbf30d5bda590f42b9ce54eab6515f6a5a426
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/235604
Auto-Submit: Slava Egorov <72c81f38df725d8f1832acb9b5bb99563fc2f1b9@google.com>
Commit-Queue: Slava Egorov <72c81f38df725d8f1832acb9b5bb99563fc2f1b9@google.com>
Reviewed-by: William Hesse <a821cddceae7dc400f272e3cb1a72f400f9fed6d@google.com>
Commit-Queue: William Hesse <a821cddceae7dc400f272e3cb1a72f400f9fed6d@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk