pyqt5: remove old fixes

Since about 5 hydra evaluations ago the build log has:

substituteStream(): WARNING: pattern 'install_dir=pydbusmoddir' doesn't match anything in file 'configure.py'
substituteStream(): WARNING: pattern 'ModuleMetadata(qmake_QT=['webkitwidgets'])' doesn't match anything in file 'configure.py'

Looking at the original configure.py I don't see any mention of
pydbusmoddir and ModuleMetadata seems to be set like the patch suggests:

    'QtWebKitWidgets':      ModuleMetadata(
                                    qmake_QT=['webkitwidgets',
                                            'printsupport']),

It appears that we don't need the fix anymore.

Reverts: d3ed0ab32b ('PyQt: fix build')

pkgs/development/python-modules/pyqt/5.x.nix

@@ -49,10 +49,6 @@ in buildPythonPackage {
 
     export PYTHONPATH=$PYTHONPATH:$out/${python.sitePackages}
 
-    substituteInPlace configure.py \
-      --replace 'install_dir=pydbusmoddir' "install_dir='$out/${python.sitePackages}/dbus/mainloop'" \
-      --replace "ModuleMetadata(qmake_QT=['webkitwidgets'])" "ModuleMetadata(qmake_QT=['webkitwidgets', 'printsupport'])"
-
     ${python.executable} configure.py  -w \
       --confirm-license \
       --dbus=${dbus.dev}/include/dbus-1.0 \