Remove caching for Leiningen dependencies

The caching mechanism for Leiningen dependencies has been removed in this commit. The relevant lines in the GitHub actions workflow had been deleted, this was done with the intention to streamline the workflow by eliminating unnecessary cache steps.

.github/workflows/main.yml

@@ -48,13 +48,6 @@ jobs:
           cli: 'latest'
           lein: 'latest'
 
-      - name: Cache Leiningen dependencies
-        uses: actions/cache@v2
-        with:
-          path: ~/.m2
-          key: ${{ runner.os }}-lein-${{ hashFiles('**/project.clj') }}
-          restore-keys: ${{ runner.os }}-lein-
-
       - name: 🧪 Generate coverage report
         run: lein cloverage --lcov