BUG #8106: Redundant function definition in contrib/cube/cube.c

The following bug has been logged on the website:

Bug reference:      8106
Logged by:          Adrian Schreyer
Email address:      ams214@cam.ac.uk
PostgreSQL version: 9.2.4
Operating system:   Ubuntu 12.04 LTS
Description:        =


The cube.c file in the cube contrib module contains a prototype for the
function Datum cube(PG_FUNCTION_ARGS). The prototype seems to be an artifact
from an older version because the function is never defined and also never
used in the code.

http://doxygen.postgresql.org/cube_8c_source.html#l00052