package/python-versiontools: remove Python2 dependency

python-versiontools supports Python 3, so there's no reason to limit
it to Python 2 only.

Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Matthew Carruth <carruthm@gmail.com>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/python-versiontools/Config.in

@@ -1,6 +1,5 @@
 config BR2_PACKAGE_PYTHON_VERSIONTOOLS
 	bool "python-versiontools"
-	depends on BR2_PACKAGE_PYTHON
 	help
 	  Smart replacement for plain tuple used in __version__.