Don't fetch version dynamically

This is unnecessary, because the code does not use the version. And
setuptools was getting very confused with "mrhlpr.version", as it is
importing the top-level mrhlpr.py file, and failing to import the
module.

mrhlpr/__init__.py

 # Copyright 2022 Oliver Smith
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-version = "1.2.0"
-
 ci_labels = {
     "ignore_count": "[ci:ignore-count]",
     "skip_build": "[ci:skip-build]: already built successfully in CI",

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "mrhlpr"
-dynamic = ["version"]
+version = "1.3.0"
 authors = [
   {name = "postmarketOS Developers", email="info@postmarketos.org"}
 ]
@@ -35,8 +35,5 @@ api = ["python-gitlab>=4.0.0"]
 [project.urls]
 Homepage = "https://www.postmarketos.org"
 
-[tool.setuptools.dynamic]
-version = {attr =  "mrhlpr.version"}
-
 [tool.ruff]
 line-length=100