src\angle\src\config.pri: remove references to gnuwin32

gnuwin32 repository was removed from Qt 6 in f96355679.
If we don't do this, it could look for the wrong version of flex.

Done-with: Andy Shaw <andy.shaw@qt.io>
Change-Id: I15cd68ceb17c33dfc6316a469bca706100bfce60
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Liang Qi <liang.qi@qt.io>

src/angle/src/config.pri

@@ -12,14 +12,6 @@ isEmpty(ANGLE_DIR) {
     error("$$ANGLE_DIR does not contain ANGLE")
 }
 
-equals(QMAKE_HOST.os, Windows) {
-    gnutools.value = $$absolute_path(../../../../gnuwin32/bin)
-    exists($$gnutools.value/gperf.exe) {
-        gnutools.name = PATH
-        gnutools.CONFIG = always_prepend
-    }
-}
-
 defineReplace(addGnuPath) {
     gnuPath = $$1
     !isEmpty(gnuPath):!isEmpty(gnutools.name) {