TT#88050 Remove dependencies on obsolete packages

These packages got removed before the last LTS, so it is now safe to
remove dependencies on them.

Change-Id: Iebbc9bf8827ac9d8ba393beb70bba4e6807f81b9

debian/control

@@ -17,8 +17,6 @@ Depends:
  libproc-processtable-perl,
  ${misc:Depends},
  ${perl:Depends},
-Conflicts:
- ngcp-ossbss-billing (<= 3),
 Description: CDR export utilities for NGCP platforms
  These utilities export CDRs generated by NGCP platforms to CSV files that
  can be fetched by 3rd party tools.