Update the CI configuration.

Author: emina

.github/workflows/tests.yml

@@ -13,10 +13,6 @@ jobs:
         racket-version: ['8.0', 'current']
         racket-variant: ['CS']
         allow-failure: [false]
-        include:
-          - racket-version: 'current'
-            racket-variant: 'BC'
-            allow-failure: true
     name: Racket ${{ matrix.racket-version }} (${{ matrix.racket-variant }})
     runs-on: ubuntu-latest
     continue-on-error: ${{ matrix.allow-failure }}