Remove license header block from all .pt files, on advice of flacoste. Having "<!-- " before "<!DOCTYPE" is invalid anyway, and the copyright header may have been causing failures in tests that expect certain text, e.g.:
File "lib/lp/translations/tests/../stories/standalone/xx-translation-import-queue-filtering.txt", line 155, in xx-translation-import-queue-filtering.txt Failed example: print browser.contents Differences (ndiff with -expected +actual): - <!DOCTYPE... + <!-- Copyright 2009 Canonical Ltd. This software is licensed under the + GNU Affero General Public License version 3 (see the file LICENSE). + --> + <BLANKLINE> [...]