Remove deprecated python3-lang from the RDEPENDS

The python3-lang package was removed as part of the migration to the
json manifest file.  The functionality is now part of core

Signed-off-by: Derek Straka <derek@asterius.io>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-python/recipes-devtools/python/python-jsonschema.inc

@@ -11,7 +11,6 @@ RDEPENDS_${PN} += " \
     ${PYTHON_PN}-core \
     ${PYTHON_PN}-io \
     ${PYTHON_PN}-json \
-    ${PYTHON_PN}-lang \
     ${PYTHON_PN}-netclient \
     ${PYTHON_PN}-numbers \
     ${PYTHON_PN}-pkgutil \