refactor: Remove is_tmux_server_not_running_error function

lib/osal/tmux/tmux.v

@@ -7,24 +7,6 @@ import os
 import time
 import freeflowuniverse.herolib.ui.console
 
-// Check if error message indicates tmux server is not running
-fn is_tmux_server_not_running_error(error_msg string) bool {
-	// Common tmux server not running error patterns
-	tmux_not_running_patterns := [
-		'no server running',
-		'error connecting to',
-		'No such file or directory', // when socket doesn't exist
-	]
-
-	error_lower := error_msg.to_lower()
-	for pattern in tmux_not_running_patterns {
-		if error_lower.contains(pattern.to_lower()) {
-			return true
-		}
-	}
-	return false
-}
-
 @[heap]
 pub struct Tmux {
 pub mut: