ci: Remove codecov from repository (#1684)

* Remove codecov from repository

* Remove .github/codecov.yml since Codecov integration was removed (#1685)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

.github/workflows/test.yml

@@ -26,9 +26,4 @@ jobs:
         # We're using "sudo" because one of the tests leverages ping, which requires super-user privileges.
         # As for the 'env "PATH=$PATH" "GOROOT=$GOROOT"', we need it to use the same "go" executable that
         # was configured by the "Set up Go" step (otherwise, it'd use sudo's "go" executable)
-        run: sudo env "PATH=$PATH" "GOROOT=$GOROOT" go test ./... -race -coverprofile=coverage.txt -covermode=atomic
-      - name: Codecov
-        uses: codecov/codecov-action@v6.0.1
-        with:
-          files: ./coverage.txt
-          token: ${{ secrets.CODECOV_TOKEN }}
+        run: sudo env "PATH=$PATH" "GOROOT=$GOROOT" go test ./... -race