Remove panic-prone optional beep helpers

fix.txt

@@ -261,7 +261,7 @@ Priority 3: configuration, UI, and binding hardening
     Add checked wrapper operations for lifecycle-critical calls and surface
     actionable errors to Barnard.
 
-34. Beep helpers panic when the external command is absent
+[x] 34. Beep helpers panic when the external command is absent
     Files: ui.go, gumble/gumbleopenal/stream.go
     Both helpers panic on exec failure. Return/log an error or remove unused
     helpers; a missing optional beep binary must not terminate Barnard.

gumble/gumbleopenal/stream.go

@@ -4,7 +4,6 @@ import (
 	"encoding/binary"
 	"errors"
 	"math"
-	"os/exec"
 	"runtime"
 	"sync"
 	"sync/atomic"
@@ -46,16 +45,6 @@ var (
 	ErrOutputDevice = errors.New("gumbleopenal: invalid output device or parameters")
 )
 
-func beep() {
-	cmd := exec.Command("beep")
-	cmdout, err := cmd.Output()
-	if err != nil {
-		panic(err)
-	}
-	if cmdout != nil {
-	}
-}
-
 type renderCommand struct {
 	fn   func()
 	done chan struct{}

ui.go

@@ -3,7 +3,6 @@ package main
 import (
 	"fmt"
 	"os"
-	"os/exec"
 	"strings"
 	"time"
 
@@ -24,16 +23,6 @@ const (
 	uiViewAdmin       = "admin"
 )
 
-func Beep() {
-	cmd := exec.Command("beep")
-	cmdout, err := cmd.Output()
-	if err != nil {
-		panic(err)
-	}
-	if cmdout != nil {
-	}
-}
-
 func esc(str string) string {
 	return sanitize.HTML(str)
 }
@@ -42,10 +31,6 @@ func (b *Barnard) Notify(event string, who string, what string) {
 	b.notifyChannel <- []string{event, who, what}
 }
 
-func (b *Barnard) Beep() {
-	Beep()
-}
-
 func (b *Barnard) SetSelectedUser(user *gumble.User) {
 	b.selectedUser = user
 	if user == nil {