python-ply: fix circular dependency

Removing python3 conditional DEPENDS to avoid a circular dependency.

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

lang/python/python-ply/Makefile

@@ -44,7 +44,7 @@ endef
 
 define Package/python3-ply
 $(call Package/python-ply/Default)
-  DEPENDS:=+PACKAGE_python3-ply:python3-light
+  DEPENDS:=+python3-light
   VARIANT:=python3
 endef