dictionary_dcca_3gpp.json: remove base AVPs
Remove non-3GPP AVPs that are actually from base IETF RFCs:
- MIP6-Feature-Vector (124). IETF RFC 5447
- Service-Selection (493). IETF RFC 5778
- Mobile-Node-Identifier (506). IETF RFC 5779
- QoS-Capability (578). IETF RFC 5777.
Possibly previously miscategorized because the tables
in 3GPP TS 29.273 list these in the "Diameter AVP"
tables instead of the "Re-used Diameter AVP" tables;
the other IETF AVPs are listed in the latter.
For example, see Table 6.2.3.1/1: Diameter SWd AVPs
versus Table 6.2.3.1/2: SWd re-used Diameter AVPs.