obsolete code

fmgr.c contains this:
   /*     * !!! OLD INTERFACE !!!     *     * fmgr() is the only remaining vestige of the old-style caller support
*functions.  It's no longer used anywhere in the Postgres   distribution,     * but we should leave it around for a
releaseor two to ease the   transition     * for user-supplied C functions.  OidFunctionCallN() replaces it   for new
 * code.     *     * DEPRECATED, DO NOT USE IN NEW CODE     */
 

which git tells me dates from:
   48165ec2    (  Tom Lane 2000-06-05 07:29:25 +0000 2080)


Should we just drop all support for the old interface now?

cheers

andrew