package/Config.in: remove double /

Detected by check-package, which gets confused by it.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/Config.in

@@ -1069,7 +1069,7 @@ menu "External python modules"
 	source "package/python-slob/Config.in"
 	source "package/python-smbus-cffi/Config.in"
 	source "package/python-socketio/Config.in"
-	source "package/python-sortedcontainers//Config.in"
+	source "package/python-sortedcontainers/Config.in"
 	source "package/python-spidev/Config.in"
 	source "package/python-sqlalchemy/Config.in"
 	source "package/python-subprocess32/Config.in"