Remove remove-potcdate.sin from wescamp-import

If we delete the remove-potcdate.sin scripts, we may as well remove the paragraph importing them.

utils/wescamp_import

@@ -53,29 +53,6 @@ find data/campaigns/%(campaign)s -name '*.cfg' -print
 find data/campaigns/%(campaign)s -name '*.lua' -print
 EOF
 
-
-cat > po/%(textdomain)s/remove-potcdate.sin <<'EOF'
-#Sed script that remove the POT-Creation-Date line in the header entry
-# from a POT file.
-#
-# The distinction between the first and the following occurrences of the
-# pattern is achieved by looking at the hold space.
-/^"POT-Creation-Date: .*"$/{
-x
-# Test if the hold space is empty.
-s/P/P/
-ta
-# Yes it was empty. First occurrence. Remove the line.
-g
-d
-bb
-:a
-# The hold space was nonempty. Following occurrences. Do nothing.
-x
-:b
-}
-EOF
-
 cat > po/%(textdomain)s/Makevars <<'EOF'
 # Makefile variables for PO directory in any package using GNU gettext.