In rev. 1.2 we have introduced a fallback handler for files with unknown

In rev. 1.2 we have introduced a fallback handler for files with unknown
extensions.  This seems to be unnecessary and prevents less(1) from being
able to detect file changes, so remove the part.

Submitted by:	Eric Huss <e-huss netmeridian com>
PR:		bin/102624
Discussed with:	des
MFC After:	3 days