contrib: qt: remove create_pc from patch

It is no longer needed here, as create_pc is added globally to CONFIG
using the qmake toolchain file.

contrib/src/qt/set-mkspecs-properties.patch

@@ -1,11 +1,9 @@
 --- a/mkspecs/features/qml_plugin.prf	2020-09-02 12:15:07.000000000 +0200
 +++ b/mkspecs/features/qml_plugin.prf	2022-08-31 10:58:10.110600024 +0200
-@@ -12,7 +12,11 @@
- load(qt_build_config)
+@@ -13,6 +13,10 @@
 
  TEMPLATE = lib
--CONFIG += plugin
-+CONFIG += plugin create_pc
+ CONFIG += plugin
 +qmlprefixpclib_replace.match = $$dirname(_QMAKE_CONF_)
 +qmlprefixpclib_replace.replace = $$[QT_INSTALL_PREFIX]
 +qmlprefixpclib_replace.CONFIG = path
@@ -15,12 +13,10 @@
      qtConfig(debug_and_release): CONFIG += debug_and_release
 --- a/mkspecs/features/qt_plugin.prf	2020-09-02 12:15:07.000000000 +0200
 +++ b/mkspecs/features/qt_plugin.prf	2022-08-31 10:59:48.380662936 +0200
-@@ -14,8 +14,12 @@
- isEmpty(PLUGIN_TYPE): error("PLUGIN_TYPE (plugins/ subdirectory) needs to be defined.")
+@@ -15,6 +15,10 @@
 
  TEMPLATE = lib
--CONFIG += plugin
-+CONFIG += plugin create_pc
+ CONFIG += plugin
 +pluginpclib_replace.match = $$MODULE_BASE_OUTDIR/lib
 +pluginpclib_replace.replace = $$[QT_INSTALL_LIBS]
 +pluginpclib_replace.CONFIG = path
@@ -28,7 +24,6 @@
  DESTDIR = $$MODULE_BASE_OUTDIR/plugins/$$PLUGIN_TYPE
 
  win32:CONFIG(shared, static|shared) {
-     # Embed a VERSIONINFO resource into the plugin's DLL.
 --- a/mkspecs/features/qml_plugin.prf	2022-09-02 14:15:09.023765377 +0200
 +++ b/mkspecs/features/qml_plugin.prf	2022-09-02 14:59:06.296938907 +0200
 @@ -30,9 +30,9 @@