build(pyproject): 移除重复的开发依赖配置

移除在 pyproject.toml 文件中重复定义的开发依赖组，
这些依赖已经在其他位置进行了配置。

pyproject.toml

@@ -17,10 +17,3 @@ build-backend = "hatchling.build"
 
 [[tool.uv.index]]
 url = "https://mirrors.aliyun.com/pypi/simple"
-
-[dependency-groups]
-dev = [
-    "pytest>=8.4.2",
-    "pytest-cov>=7.0.0",
-    "pytest-xdist>=3.8.0",
-]