Release process: drop workaround that has not been needed for years.

wiki/src/contribute/release_process.mdwn

@@ -197,12 +197,6 @@ main Tails repository. For example:
 	cd whisperback
 	"${RELEASE_CHECKOUT:?}"/import-translations
 
-If the `import-translations` script fails to import translations for
-the current package, manually copy updated PO files from the
-Transifex branches of `git://git.torproject.org/translation.git` (e.g.
-`whisperback_completed`) instead. In this case, skip PO files for
-[[translation teams that use Git|contribute/how/translate#translate]].
-
 Then check the PO files:
 
 	"${RELEASE_CHECKOUT:?}"/submodules/jenkins-tools/slaves/check_po