build: Remove support for Ice 3.3
Remove obsolete, broken and unused scripts
remove further Ice 3.3 from OMERO 5.1
Merge pull request #1 from mtbc/ice33-removal-rleigh

Remove further Ice 3.3 references from OMERO 5.1
Merge pull request #2455 from rleigh-dundee/ice33-removal

Remove support for Ice 3.3