refactor: remove helpers the new output and prompts left unused

Drop writeDownload, terminal.Require, terminal.Confirm, terminal.Row,
terminal.Record and Pulls.FindOpenByHead, which no command calls anymore,
and point their tests at the code that replaced them.

Signed-off-by: bircni <bircni@icloud.com>

internal/services/pulls_test.go

@@ -57,7 +57,7 @@ func TestPullMilestoneClearUsesIssueEndpoint(t *testing.T) {
 	}
 }
 
-func TestFindOpenByHeadPagesPastSmallServerLimitsAndMatchesExactly(t *testing.T) {
+func TestListOpenPagesPastSmallServerLimits(t *testing.T) {
 	client := newTestClient(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		assert.Equal(t, "/api/v1/repos/alice/project/pulls", r.URL.Path)
 		switch r.URL.Query().Get("page") {
@@ -70,11 +70,10 @@ func TestFindOpenByHeadPagesPastSmallServerLimitsAndMatchesExactly(t *testing.T)
 		}
 	}))
 	service := Pulls{Client: client, Repository: "alice/project"}
-	item, err := service.FindOpenByHead(context.Background(), "feature")
+	items, err := service.ListOpen(context.Background())
 	require.NoError(t, err)
-	require.EqualValues(t, 2, item.Number)
-	_, err = service.FindOpenByHead(context.Background(), "FEATURE")
-	require.ErrorContains(t, err, "no open pull request")
+	require.Len(t, items, 2)
+	require.Equal(t, "feature", items[1].Head)
 }
 
 func TestListOpenRejectsEndlessPagination(t *testing.T) {