python3-flask-script: remove recipe

This package has long been deprecated by upstream maintainers and doesn't
even work in meta-openembedded due to a run-time import error. Remove
the recipe.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-core/packagegroups/packagegroup-meta-python.bb

@@ -137,7 +137,6 @@ RDEPENDS:packagegroup-meta-python3 = "\
     python3-flask-nav \
     python3-flask-pymongo \
     python3-flask-restful \
-    python3-flask-script \
     python3-flask-sijax \
     python3-flask-socketio \
     python3-flask-sqlalchemy \