update ci

Author: remo87

.github/workflows/ci.yaml

@@ -27,25 +27,12 @@ jobs:
           java-version: 21
           cache: sbt
 
-      - id: cache
-        name: Cache dependencies
-        uses: actions/cache@v4
-        with:
-          path: |
-            ~/.cache/coursier
-            ~/.ivy2/cache
-            ~/.sbt
-          key: ${{ runner.os }}-sbt-${{ hashFiles('**/build.sbt') }}
-
       - id: linter
         name: Lint code
         run: sbt scalafmtCheckAll
   tests:
-    name: Run tests in parallel
+    name: Run tests
     runs-on: ubuntu-22.04
-    strategy:
-      matrix:
-        scala-version: [2.12.20, 2.13.11, 3.4.2]
 
     steps:
       - id: checkout