Remove a few unused scripts from tools/bin/scripts

[mlutfy]

Overview

Removes some old scripts that shouldn't be in the main codebase. Many are old legacy scripts that have not been used in a long time.

• tools/bin/scripts/ImportTags.php: last changed in 2013. It's not documented, and unclear purpose.
• tools/bin/scripts/create-pot-files: duplicates a script in the l10n repo
• tools/bin/scripts/createdoc.sh: no idea what this does, no recent change since SVN migration
• tools/bin/scripts/delete.sh: seems like a helper script for a one-off comment change
• tools/bin/scripts/drop-closing-php-tags.sh: one-off helper script
• tools/bin/scripts/ircbot-civi.py: not used
• tools/bin/scripts/memcache.php: does not seem to serve a purpose
• tools/bin/scripts/runStressTest.sh.txt: helper script, not used

[civibot]

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[eileenmcnaughton]

Seems ok to me @totten that memcache one - does that ring a bell?

[totten]

@eileenmcnaughton - Nope, don't think it's needed.

@mlutfy - Agree with all those removals.