Removed some unnecessary includes.
[wine] / dlls / ddraw / ddraw /
drwxr-xr-x   ..
-rw-r--r-- 25189 dga.c
-rw-r--r-- 15336 dga2.c
-rw-r--r-- 19316 main.c
-rw-r--r-- 44261 x11.c