[pygobject] build: remove libdir from the .pc file

[Christoph Reiter <creiter src gnome org>]

commit 05159327eb70a75bc876a2355f5f31c6d424c1d5
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Tue Feb 6 18:15:05 2018 +0100

    build: remove libdir from the .pc file
    
    It's unused afaics and in the distutils case we can't replicated
    what autotools does, so better remove it.

 pygobject-3.0.pc.in | 1 -
 setup.py            | 1 -
 2 files changed, 2 deletions(-)
---
diff --git a/pygobject-3.0.pc.in b/pygobject-3.0.pc.in
index c54bd451..ca494231 100644
--- a/pygobject-3.0.pc.in
+++ b/pygobject-3.0.pc.in
@@ -3,7 +3,6 @@ exec_prefix=@exec_prefix@
 includedir=@includedir@
 datarootdir=@datarootdir@
 datadir=@datadir@
-libdir=@libdir@
 
 # you can use the --variable=pygobjectincludedir argument to
 # pkg-config to get this value. You might want to use this to
diff --git a/setup.py b/setup.py
index 96a0ceef..e5129e01 100755
--- a/setup.py
+++ b/setup.py
@@ -725,7 +725,6 @@ class install_pkgconfig(Command):
             "includedir": "${prefix}/include",
             "datarootdir": "${prefix}/share",
             "datadir": "${datarootdir}",
-            "libdir": "",  # XXX: we don't know it, ignore for now..
             "VERSION": self.distribution.get_version(),
         }
         for key, value in config.items():