python-simplejson: fix circular dependency

Removing python2 conditional DEPENDS to avoid a circular dependency.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

lang/python/python-simplejson/Makefile

@@ -34,7 +34,7 @@ endef
 define Package/python-simplejson
 $(call Package/python-simplejson/Default)
   TITLE:=Simple, fast, extensible JSON encoder/decoder for Python 2
-  DEPENDS:=+PACKAGE_python-simplejson:python-light
+  DEPENDS:=+python-light
   VARIANT:=python
 endef