python3-pydbus-manager: remove obsolete recipe

This project has been untouched upstream for six years and doesn't appear
to be considered "finished".

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-core/packagegroups/packagegroup-meta-python.bb

@@ -315,7 +315,6 @@ RDEPENDS:packagegroup-meta-python3 = "\
     python3-pyconnman \
     python3-pycurl \
     python3-pydbus \
-    python3-pydbus-manager \
     python3-pydicti \
     python3-pyephem \
     python3-pyexpect \