Remove some unused code that fails to compile with -Wundef

Remove some unused code that fails to compile with -Wundef

This code contains "#if DEBUG" where DEBUG is undefined, which is
rejected with gcc's -Wundef option.

Since the code is unused it makes more sense to remove it than try to
fix it.

BUG=http://code.google.com/p/nativeclient/issues/detail?id=2787
TEST=build

Committed: https://src.chromium.org/viewvc/native_client?view=rev&revision=8804

[bsy, 2012-06-04 22:40:41]

lgtm