Remove concurrency check from translate CI. (#15)

Author: kattni

.github/workflows/translate.yml

@@ -4,11 +4,6 @@ on:
     branches:
       main
 
-# Cancel active CI runs for a PR before starting another run
-concurrency:
-  group: translate-${{ github.ref }}
-  cancel-in-progress: true
-
 defaults:
   run:
     shell: bash  # https://github.com/beeware/briefcase/pull/912