filemerge: remove the hgmerge script
This is now better handled using [merge-tools] and [merge-patterns] in hgrc.
#!/bin/shhg initecho a > ahg ci -Am thg mv a bhg ci -Am t1hg debugrename bhg mv b ahg ci -Am t2hg debugrename aecho % test with --revhg debugrename --rev 1 b