Remove last remains of DirectDraw renderer

SDL2 patch replaced it with output=texture renderer=direct3d

configure.ac

@@ -499,26 +499,6 @@ else
    AC_MSG_RESULT(no)
 fi
 
-AH_TEMPLATE(C_DDRAW,[Define to 1 to enable output=ddraw (Win32)])
-AC_ARG_ENABLE(ddraw,AC_HELP_STRING([--disable-ddraw],[Disable ddraw support]),,enable_ddraw=yes)
-AC_CHECK_HEADER(ddraw.h, have_ddraw_h=yes , have_ddraw_h=no , )
-AC_MSG_CHECKING(whether ddraw display output will be enabled)
-if test x$enable_ddraw = xyes; then
-case "$host" in
-    *-*-cygwin* | *-*-mingw* | *-*-msys*)
-       if test x$have_ddraw_h = xyes ; then
-         AC_MSG_RESULT(yes)
-         AC_DEFINE(C_DDRAW,1)
-       else
-         AC_MSG_RESULT(no)
-       fi
-       ;;
-    *)
-       AC_MSG_RESULT(no)
-       ;;
-esac
-fi
-
 dnl Check for mprotect. Needed for 64 bits linux
 AH_TEMPLATE(C_HAVE_MPROTECT,[Define to 1 if you have the mprotect function])
 AC_CHECK_HEADER([sys/mman.h], [

src/gui/sdlmain.cpp

@@ -99,14 +99,6 @@ extern char** environ;
 #define WIN32_LEAN_AND_MEAN
 #endif
 #include <windows.h>
-#if C_DDRAW
-#include <ddraw.h>
-struct private_hwdata {
-	LPDIRECTDRAWSURFACE3 dd_surface;
-	LPDIRECTDRAWSURFACE3 dd_writebuf;
-};
-#endif
-
 #define STDOUT_FILE	TEXT("stdout.txt")
 #define STDERR_FILE	TEXT("stderr.txt")
 #define DEFAULT_CONFIG_FILE "/dosbox.conf"

src/platform/visualc/config.h

@@ -7,9 +7,6 @@
 /* Define to 1 to enable internal debugger, requires libcurses */
 #define C_DEBUG 0
 
-/* Define to 1 to enable output=ddraw */
-#define C_DDRAW 1
-
 /* Define to 1 to enable screenshots, requires libpng */
 #define C_SSHOT 1