pgsql: Remove copied comments from geo_ops.c source file and replace

Log Message:
-----------
Remove copied comments from geo_ops.c source file and replace with new
comments, and cleanup functions. Remove copyright that is no longer
relevant.

Modified Files:
--------------
pgsql/src/backend/utils/adt:
geo_ops.c (r1.95 -> r1.96)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/geo_ops.c.diff?r1=1.95&r2=1.96)