HPCC-11292 Fix CentOS6 Build

    - Remove unused install script references

Signed-off-by: Gleb Aronsky <gleb.aronsky@lexisnexis.com>
Merge pull request #1 from garonsky/HPCC-11292_centos6_build_fix_2

HPCC-11292 Fix CentOS6 Build

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>