python3-networkmanager: remove abandoned recipe

python-networkmanager was abandoned upstream in 2023:

  ⚠️ This project is no longer maintained. ⚠️
  If you are looking for an alternative, please try
  https://github.com/python-sdbus/python-sdbus-networkmanager

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

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

@@ -57,7 +57,6 @@ RDEPENDS:packagegroup-meta-networking-connectivity = "\
     networkmanager-openvpn \
     networkmanager \
     openconnect \
-    python3-networkmanager \
     rdate \
     rdist \
     ${@bb.utils.contains("DISTRO_FEATURES", "pam", "samba", "", d)} \