remove connection_shim and fix connection printer (#808)
remove connection_shim and fix connection printer (#808)

Remove the dead `cell_connection_shim` from the python wrapper.

Fix the connection printer to take an `arb::cell_connection` argument, to fix a runtime python crash caused by passing an `arb::cell_connection` where a `cell_connection_shim` was expected.
halfflat/arbor,eth-cscs/nestmc-proto,halfflat/nestmc-proto,eth-cscs/nestmc-proto,halfflat/arbor,halfflat/arbor,halfflat/nestmc-proto,eth-cscs/nestmc-proto,halfflat/arbor,halfflat/nestmc-proto,halfflat/arbor