HAWQ-1122. Remove unused file load.sql
HAWQ-1122. Remove unused file load.sql

Through the file content we know it uses personal absolute path, which
can't be used by others. DisableXform/EnableXform are already built-in
functions if GPDB is built with Orca. So we can safely delete this file.

This is cherry-picked from greenplum-db/gpdb@1033c5362f19f0121eddf314a49b319f3582aa9e

wengyanqing/incubator-hawq,outofmem0ry/incubator-hawq,outofmem0ry/incubator-hawq,huor/incubator-hawq,huor/incubator-hawq,wengyanqing/incubator-hawq,wengyanqing/incubator-hawq,wengyanqing/incubator-hawq,huor/incubator-hawq,huor/incubator-hawq,stanlyxiang/incubator-hawq,outofmem0ry/incubator-hawq,stanlyxiang/incubator-hawq,huor/incubator-hawq,lavjain/incubator-hawq,outofmem0ry/incubator-hawq,outofmem0ry/incubator-hawq,huor/incubator-hawq,stanlyxiang/incubator-hawq,wengyanqing/incubator-hawq,lavjain/incubator-hawq,outofmem0ry/incubator-hawq,stanlyxiang/incubator-hawq,stanlyxiang/incubator-hawq,wengyanqing/incubator-hawq,huor/incubator-hawq,jianlirong/incubator-hawq,wengyanqing/incubator-hawq,lavjain/incubator-hawq,wengyanqing/incubator-hawq,jianlirong/incubator-hawq,stanlyxiang/incubator-hawq,lavjain/incubator-hawq,lavjain/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,stanlyxiang/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,lavjain/incubator-hawq,jianlirong/incubator-hawq,outofmem0ry/incubator-hawq,jianlirong/incubator-hawq,outofmem0ry/incubator-hawq,lavjain/incubator-hawq,lavjain/incubator-hawq