remove list command and instead write "subscriptions.gmi" & "feed.gmi"

comitium.go

@@ -59,12 +59,14 @@ func main() {
 		fetch.RefreshAll(&core.Data, *refreshWorkersFlag)
 		err = core.Data.WriteSubs(dataPath)
 		if err != nil {
-			fmt.Fprintf(os.Stderr, "Error saving subscriptions: %v\n", err)
+			fmt.Fprintf(os.Stderr, "Error writing subscriptions: %v\n", err)
+			os.Exit(1)
+		}
+		err = core.Data.WriteFeed(dataPath)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error writing feed: %v\n", err)
 			os.Exit(1)
 		}
-	case "list":
-		argCheck(c.Args(), 0, false, "'list' doesn't take an argument!")
-		core.Data.Export(os.Stdout)
 	case "add":
 		argCheck(c.Args(), 1, true, "Please provide a URL to add.")