Distribution specific patch, not going upstream

This workaround for Gentoo interferes with our use of --no-compile during
the 'install stage.

diff --git a/setup.py b/setup.py
index bd65109379..a97a310ea3 100755
--- a/setup.py
+++ b/setup.py
@@ -1081,8 +1081,6 @@ if verbose_ENABLED and not os.environ.get("DISTUTILS_DEBUG"):


 def do_add_cython_ext(*args, **kwargs) -> None:
-    if "--no-compile" in sys.argv and not ("build" in sys.argv and "install" in sys.argv):
-        return
     if not cython_ENABLED:
         raise ValueError(f"cannot build {args}: cython compilation is disabled")
     if cython_tracing_ENABLED:
@@ -2301,11 +2299,6 @@ else:

         def _get_root_prefix(self) -> str:
             root_prefix = ""
-            for x in sys.argv:
-                if x.startswith("--root="):
-                    return x[len("--root="):]
-                if x.startswith("--prefix="):
-                    root_prefix = x[len("--prefix="):]
             if not root_prefix:
                 install_dir = self._get_install_dir()
                 root_prefix = install_dir.rstrip("/")
@@ -2466,13 +2459,6 @@ else:
             if uinput_ENABLED:
                 add_data_files("lib/udev/rules.d/", ["fs/lib/udev/rules.d/71-xpra-virtual-pointer.rules"])

-    # gentoo does weird things, calls --no-compile with build *and* install
-    # then expects to find the cython modules!? ie:
-    #> python2.7 setup.py build -b build-2.7 install --no-compile \
-    # --root=/var/tmp/portage/x11-wm/xpra-0.7.0/temp/images/2.7
-    # otherwise we use the flags to skip pkgconfig
-    if ("--no-compile" in sys.argv or "--skip-build" in sys.argv) and not ("build" in sys.argv and "install" in sys.argv):  # noqa: E501
-        pkgconfig = no_pkgconfig

     if OSX and "py2app" in sys.argv:
         import py2app    #@UnresolvedImport