Update backend readiness check to use TCP port instead of Unix socket

vidai.py

@@ -379,22 +379,13 @@ Examples:
         max_wait = 15
         for i in range(max_wait):
             try:
-                if is_unix_sockets_supported():
-                    # Check Unix socket
-                    sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
-                    sock.settimeout(1)
-                    sock.connect(get_socket_path('worker'))
-                    sock.close()
-                    print("Backend Unix socket is ready!")
-                    break
-                else:
-                    # Check TCP port
-                    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-                    sock.settimeout(1)
-                    sock.connect((args.backend_host, args.backend_worker_port))
-                    sock.close()
-                    print("Backend TCP port is ready!")
-                    break
+                # Check TCP port for worker
+                sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+                sock.settimeout(1)
+                sock.connect((args.backend_host, args.backend_worker_port))
+                sock.close()
+                print("Backend TCP port is ready!")
+                break
             except (FileNotFoundError, ConnectionRefusedError, OSError):
                 if i < max_wait - 1:
                     print(f"Waiting for backend... ({i+1}/{max_wait})")
@@ -430,22 +421,13 @@ Examples:
         max_wait = 15
         for i in range(max_wait):
             try:
-                if is_unix_sockets_supported():
-                    # Check Unix socket
-                    sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
-                    sock.settimeout(1)
-                    sock.connect(get_socket_path('worker'))
-                    sock.close()
-                    print("Backend Unix socket is ready!")
-                    break
-                else:
-                    # Check TCP port
-                    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-                    sock.settimeout(1)
-                    sock.connect((args.backend_host, args.backend_worker_port))
-                    sock.close()
-                    print("Backend TCP port is ready!")
-                    break
+                # Check TCP port for worker
+                sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+                sock.settimeout(1)
+                sock.connect((args.backend_host, args.backend_worker_port))
+                sock.close()
+                print("Backend TCP port is ready!")
+                break
             except (FileNotFoundError, ConnectionRefusedError, OSError):
                 if i < max_wait - 1:
                     print(f"Waiting for backend... ({i+1}/{max_wait})")