chore: pyproject.tomlの不要な項目を削除 (#1796)

Author: nanae772

pyproject.toml

@@ -1,8 +1,6 @@
 [project]
 name = "voicevox_engine"
-version = "0.24.0"
-description = "Add your description here"
-readme = "README.md"
+version = "0.24.0" # TODO: できればversionを自動管理する
 requires-python = "==3.11.9"
 dependencies = [
   "fastapi-slim>=0.115.5",