Remove new_variables_ui feature flag and related code
We have rebuilt the CI variables UI feature and moved it to Vue.
app/assets/javascripts/ci_variable_list
We should clean up the feature new_variables_ui
and remove all stale code/specs.
app/views/ci/variables
some of this UI might be reused in other places so we should check before removing!
Edited
by
Payton Burdette