On the principle that it's good secur1ty to remove executables you're not likely
to use, clearing out all the bits of ADOdb we're currently not using. This includes
drivers and data dictionaries for other DBs, tests, docs, icons, PHP4 session code,
pear auth container, and non-English error messages.

Change-Id: Ibf059ed1d0d7dafbbce16589ead2c0a006e3fcdd
Signed-off-by: Aaron Wells <aaronw@catalyst.net.nz>