[dvsim] Remove unused --local argument
[dvsim] Remove unused --local argument

This doesn't currently do anything and is not used anywhere in
OpenTitan. Let's put it back in if we find a use for it.

Signed-off-by: Rupert Swarbrick <290093e2ad2515ed2f14d749293c8cf8e02ca274@lowrisc.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan