No longer test availability of the gdi32 library, nor use it for linking, even

when we have been doing this since revision 1.47 of configure.ac 4 years and
5 months ago when cross-compiling a Windows target. We actually don't use any
function from the Windows GDI (Graphics Device Interface) related with drawing
or graphics-related operations.

configure.ac

@@ -1247,28 +1247,6 @@ if test X"$OPT_SSL" != Xno; then
     fi
   fi
 
-  dnl This is for Msys/Mingw
-  case $host in
-    *-*-cygwin*)
-      dnl Under Cygwin this is extraneous and causes an unnecessary -lgdi32
-      dnl to be added to LIBS and recorded in the .la file.
-      ;;
-    *)
-      AC_MSG_CHECKING([for gdi32])
-      my_ac_save_LIBS=$LIBS
-      LIBS="-lgdi32 $LIBS"
-      AC_TRY_LINK([#include <windef.h>
-                   #include <wingdi.h>],
-                   [GdiFlush();],
-                   [ dnl worked!
-                   AC_MSG_RESULT([yes])],
-                   [ dnl failed, restore LIBS
-                   LIBS=$my_ac_save_LIBS
-                   AC_MSG_RESULT(no)]
-                  )
-      ;;
-  esac
-
   AC_CHECK_LIB(crypto, CRYPTO_lock,[
      HAVECRYPTO="yes"
      LIBS="-lcrypto $LIBS"