largefiles: align the output messages for a removed file with core methods
Both cmdutil.remove() and scmutil.addremove() require verbose mode or an inexact
match to print the filename. Core addremove also prints the file relative to
cwd only if patterns are provided to the command. And finally, both methods
print the subrepo prefix when needed.
ERROR: FIXME: This is a known failure of filelog.size for data starting with \1\n
OK.