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 be7a3758e8..28dc1be191 100755
--- a/setup.py
+++ b/setup.py
@@ -953,8 +953,6 @@ if modules_ENABLED:
 # Utility methods for building with Cython

 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:
@@ -2175,9 +2173,6 @@ else:
             if root_prefix.endswith("/usr"):
                 # ie: "/" or "/usr/src/rpmbuild/BUILDROOT/xpra-0.18.0-0.20160513r12573.fc23.x86_64/"
                 root_prefix = root_prefix[:-4]
-            for x in sys.argv:
-                if x.startswith("--root="):
-                    root_prefix = x[len("--root="):]
             print(f"  root_prefix={root_prefix!r}")
             build_xpra_conf(root_prefix)

@@ -2320,13 +2315,6 @@ 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
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</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=dc3e22f4d5d7aa94fef9e380a3d2c0d71143ced9'>root</a>/<a href='/guix/log/nix?id=dc3e22f4d5d7aa94fef9e380a3d2c0d71143ced9'>nix</a>/<a href='/guix/log/nix/libutil?id=dc3e22f4d5d7aa94fef9e380a3d2c0d71143ced9'>libutil</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/nix/libutil?id=dc3e22f4d5d7aa94fef9e380a3d2c0d71143ced9&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-01-09 17:40:54 +0100'>2023-01-09</span></td><td><a href='/guix/commit/nix/libutil?id=407175a1d0e29f45639e7f28a531b3981cd20085'>daemon: Improve error message for wrong hash sizes.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libutil/hash.cc (parseHash): Show the hash algorithm name and
expected size in the error message.
* tests/derivations.scm ("fixed-output derivation, invalid hash size"):
New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-12-18 01:16:47 +0100'>2022-12-18</span></td><td><a href='/guix/commit/nix/libutil?id=2d4d26769d6a3be1b21302b0bb2bd099fd55ccf8'>daemon: Make "opening file" error messages distinguishable.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libstore/build.cc (DerivationGoal::openLogFile): Customize
"opening file" error message.
* nix/libutil/hash.cc (hashFile): Likewise.
* nix/libutil/util.cc (readFile, writeFile): Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-11-19 23:04:19 +0100'>2021-11-19</span></td><td><a href='/guix/commit/nix/libutil?id=24224530d1f4a70808d003ba8dce849b77625b79'>daemon: Micro-optimize 'deletePath'.</a><span class='msg-avail'>...<span class='msg-tooltip'>'remove' calls 'unlink' first and falls back to 'rmdir' upon EISDIR.
This change gets rid of the 'unlink' call for every directory being
removed.

* nix/libutil/util.cc (_deletePath): Call 'unlink' or 'rmdir' depending
on 'st.st_mode', rather than call 'remove'.
</span></span></td><td>Ludovic Courtès</td></tr>