KILL deletes a file in RAM storage.
Deletes the filename contained in A$
In order to KILL a file the filename must be given either explicitly or only using the "?" wildcard. Variable names are accepted, but must contain actual filenames.
If the file does not exist, then no action is taken and no warning message issued.
If wildcards are used, then all files which conform to the format are erased, e.g. if H.1 and H.2 exist as files, then:
will delete both of them.