Rm ABC?

[utzoo!decvax!harpo!eagle!mhuxt!mhuxa!mhuxh!bwkna!haight]

There is a UN*X utility that will remove any old name (but the usage is
ugly and the method can be slow for a file poised above a deep directory
sub-tree):

 find . -name '<correct number of "?" for file name match>' \
   -ok rm {} \;

The trick is that find doesn't use the shell to exec rm.