Remove deprecated python3-enum from the RDEPENDS

The python3-enum 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/python3-langtable_0.0.38.bb

@@ -25,7 +25,6 @@ RDEPENDS_${PN} += " \
     ${PYTHON_PN}-argparse \
     ${PYTHON_PN}-compression \
     ${PYTHON_PN}-doctest \
-    ${PYTHON_PN}-enum \
     ${PYTHON_PN}-logging \
     ${PYTHON_PN}-xml \
 "