gitk: Remove translated message from comments

"make update-po" fails because a previously untranslated string
has now been translated:

	Updating po/sv.po
	po/sv.po:1388: duplicate message definition...
	po/sv.po:380: ...this is the location of the first definition

Remove the duplicate message definition.

Reported-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

po/sv.po

@@ -1385,21 +1385,6 @@ msgstr "Felaktiga argument till gitk:"
 #~ msgid "mc"
 #~ msgstr "mc"
 
-#~ msgid ""
-#~ "\n"
-#~ "Gitk - a commit viewer for git\n"
-#~ "\n"
-#~ "Copyright © 2005-2016 Paul Mackerras\n"
-#~ "\n"
-#~ "Use and redistribute under the terms of the GNU General Public License"
-#~ msgstr ""
-#~ "\n"
-#~ "Gitk - en incheckningsvisare för git\n"
-#~ "\n"
-#~ "Copyright © 2005-2016 Paul Mackerras\n"
-#~ "\n"
-#~ "Använd och vidareförmedla enligt villkoren i GNU General Public License"
-
 #~ msgid "next"
 #~ msgstr "nästa"