Remove pip update strings from translations

Deleted pip-related update messages from all language JSON files to simplify and unify the update flow messaging for yt-dlp. This change removes unused or deprecated strings related to pip installation and update status.

languages/zh.json

@@ -194,30 +194,16 @@
     "found_at": "📍 在以下位置找到 yt-dlp：{path}",
     "error_getting_path": "❌ 获取 yt-dlp 路径时出错：{error}",
     "updating_binary": "📦 正在更新应用程序管理的 yt-dlp 二进制文件...",
-    "updating_pip": "🐍 正在通过 pip 更新系统 yt-dlp...",
     "update_failed": "❌ 更新 yt-dlp 失败。请重试或检查您的互联网连接。",
     "binary_updated": "✅ 二进制文件更新成功！",
     "update_failed_stderr": "❌ yt-dlp 更新失败：{error}",
     "update_timeout": "❌ yt-dlp 更新超时。",
     "unexpected_error": "❌ 更新期间出现意外错误：{error}",
-    "checking_pip": "🔍 检查当前 pip 安装...",
-    "current_version": "📋 当前版本：{version}",
-    "not_found_pip": "⚠️ 通过 pip 未找到 yt-dlp，尝试安装...",
-    "checking_latest": "🌐 检查最新版本...",
-    "failed_check_updates": "❌ 检查更新失败",
-    "latest_version": "🆕 最新版本：{version}",
-    "updating_from_to": "⬆️ 从 {current} 更新到 {latest}...",
-    "running_pip_install": "📦 运行 pip install --upgrade...",
-    "pip_completed": "✅ pip 更新完成成功！",
-    "pip_failed": "❌ pip 更新失败：{error}",
-    "pip_timeout": "❌ pip 更新超时（超过5分钟）",
     "already_up_to_date": "✅ yt-dlp已是最新版本！",
     "update_success": "✅ yt-dlp 已成功更新！",
     "already_latest": "yt-dlp 是最新版本（版本 {version}）",
     "network_error": "❌ 更新期间网络错误：{error}",
-    "general_error": "❌ 更新失败：{error}",
-    "error_pip_update": "❌ pip 更新期间出错：{error}",
-    "pip_update_failed": "❌ pip 更新失败：{error}"
+    "general_error": "❌ 更新失败：{error}"
   },
   "about": {
     "title": "关于 YTSage",