diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c5c90aa..769ae3c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -20,10 +20,3 @@ repos:
         # Linuxfabrik repositories; do not append a trailing newline.
         exclude: '^LICENSE$'
       - id: 'trailing-whitespace'
-
-  - repo: 'https://github.com/astral-sh/ruff-pre-commit'
-    rev: 'v0.16.1'
-    hooks:
-      - id: 'ruff-check'
-        args: ['--fix']
-      - id: 'ruff-format'
diff --git a/pyproject.toml b/pyproject.toml
deleted file mode 100644
index a25764d..0000000
--- a/pyproject.toml
+++ /dev/null
@@ -1,23 +0,0 @@
-[tool.ruff]
-line-length = 88
-target-version = 'py39'
-
-[tool.ruff.lint]
-select = [
-    'B',    # flake8-bugbear (potential bugs)
-    'C4',   # flake8-comprehensions
-    'E',    # pycodestyle errors
-    'F',    # pyflakes (logic errors)
-    'I',    # isort (import sorting)
-    'RUF',  # Ruff-specific rules
-    'SIM',  # flake8-simplify
-    'UP',   # pyupgrade (modernize syntax for py39+)
-    'W',    # pycodestyle warnings
-]
-ignore = [
-    'E501',  # line too long (handled by code review, not auto-enforcement)
-]
-
-[tool.ruff.format]
-docstring-code-format = true
-quote-style = 'single'