Remove coveralls GH Action

Signed-off-by: Mayank Shah <mayankshah1614@gmail.com>

.github/workflows/coverage.yaml

@@ -1,31 +0,0 @@
-name: Goveralls (Unit test)
-on: [push, pull_request]
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        go: ['1.13']
-
-    steps:
-      - uses: actions/setup-go@v1
-        with:
-          go-version: ${{ matrix.go }}
-      - uses: actions/checkout@v2
-      - run: go test -v -coverprofile=profile.cov ./pkg/...
-      - name: Send coverage
-        uses: shogo82148/actions-goveralls@v1
-        with:
-          path-to-profile: profile.cov
-          flag-name: Go-${{ matrix.go }}
-          parallel: true
-
-  # notifies that all test jobs are finished.
-  finish:
-    needs: test
-    runs-on: ubuntu-latest
-    steps:
-      - uses: shogo82148/actions-goveralls@v1
-        with:
-          parallel-finished: true