[#308] Remove downloadContractsFromGithub from the frostfs-adm

Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>

cmd/frostfs-adm/internal/modules/morph/download.go

@@ -1,40 +0,0 @@
-package morph
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"io"
-	"net/http"
-	"strings"
-
-	"github.com/google/go-github/v39/github"
-	"github.com/spf13/cobra"
-)
-
-func downloadContractsFromGithub(cmd *cobra.Command) (io.ReadCloser, error) {
-	gcl := github.NewClient(nil)
-	release, _, err := gcl.Repositories.GetLatestRelease(context.Background(), "nspcc-dev", "frostfs-contract")
-	if err != nil {
-		return nil, fmt.Errorf("can't fetch release info: %w", err)
-	}
-
-	cmd.Printf("Found %s (%s), downloading...\n", release.GetTagName(), release.GetName())
-
-	var url string
-	for _, a := range release.Assets {
-		if strings.HasPrefix(a.GetName(), "frostfs-contract") {
-			url = a.GetBrowserDownloadURL()
-			break
-		}
-	}
-	if url == "" {
-		return nil, errors.New("can't find contracts archive in release assets")
-	}
-
-	resp, err := http.Get(url)
-	if err != nil {
-		return nil, fmt.Errorf("can't fetch contracts archive: %w", err)
-	}
-	return resp.Body, nil
-}