Remove workaround for CI issue

.github/workflows/ci.yml

@@ -14,16 +14,6 @@ jobs:
     - uses: iffy/install-nim@v3
       with:
         version: ${{ matrix.nim }}
-
-    # workaround for https://github.com/iffy/install-nim/issues/11
-    - name: Workaround SSL error with choosenim
-      run: |
-          curl -fO https://curl.se/ca/cacert.pem
-          install cacert.pem ~/.nimble/bin
-          ls ~/.nimble/bin
-      shell: bash
-      if: runner.os == 'Windows'
-
     - name: Build
       run: nimble install -y
     - name: Test