Remove useless code (#2)

* Remove version file

* Remove util.py

* Remove dateutil dependency

* Remove useless dependencies

Author: AdrienVannson

poetry.lock

@@ -18,7 +18,6 @@ betterproto = { git = "https://github.com/betterproto/python-betterproto2", rev
 ruff = "~0.7.4"
 grpclib = "^0.4.1"
 jinja2 = ">=3.0.3"
-python-dateutil = "^2.8"
 typing-extensions = "^4.7.1"
 
 [tool.poetry.group.dev.dependencies]
@@ -32,20 +31,11 @@ mkdocstrings = {version = "^0.27.0", python = ">=3.10", extras = ["python"]}
 [tool.poetry.group.test.dependencies]
 poethepoet = ">=0.9.0"
 pytest = "^6.2.5"
-pytest-asyncio = "^0.12.0"
-pytest-cov = "^2.9.0"
-pytest-mock = "^3.1.1"
-pydantic = ">=2.0,<3"
 protobuf = "^4"
-cachelib = "^0.10.2"
-tomlkit = ">=0.7.0"
 
 [tool.poetry.scripts]
 protoc-gen-python_betterproto = "betterproto2_compiler.plugin:main"
 
-[tool.poetry.extras]
-rust-codec = ["betterproto-rust-codec"]
-
 [tool.ruff]
 extend-exclude = ["tests/output_*"]
 target-version = "py310"
@@ -73,7 +63,7 @@ combine-as-imports = true
 
 [tool.poe.tasks.generate]
 script = "tests.generate:main"
-help = "Generate test cases (do this once before running test)"
+help = "Generate test cases"
 
 [tool.poe.tasks.types]
 cmd  = "mypy src --ignore-missing-imports"
@@ -103,10 +93,6 @@ help = "Check that the source code is formatted"
 cmd = "ruff check --select I src tests"
 help = "Check that the imports are sorted"
 
-[tool.poe.tasks.docs]
-cmd  = "sphinx-build docs docs/build"
-help = "Build the sphinx docs"
-
 [tool.poe.tasks.generate_lib]
 cmd = """
 protoc