drd: Remove drd/drd_list.h again because of its GPLv2 license.

For more info about Valgrind source code licensing, see also:
[1] Top level README line 51.
[2] http://valgrind.org/docs/manual/manual-intro.html#manual-intro.overview, last paragraph.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12356 a5019735-40e9-0310-863c-91ae7b9d1cf9
5 files changed