Removed license classifier in favor of SPDX entry.

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools >= 61.0"]
+requires = ["setuptools >= 77.0"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -8,7 +8,7 @@ dynamic = ["version"]
 authors = [
     {name = "Roman Dobosz", email = "gryf73@gmail.com"}
 ]
-license = {text = "GPLv3"}
+license = "GPL-3.0-or-later"
 description = "Run Linux cloud image on top of VirtualBox using commandline tool"
 readme = "README.rst"
 requires-python = ">=3.8"
@@ -18,7 +18,6 @@ classifiers = [
     "Intended Audience :: End Users/Desktop",
     "Topic :: Terminals",
     "Topic :: Utilities",
-    "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
@@ -44,9 +43,6 @@ py-modules = ["box"]
 [tool.setuptools.dynamic]
 version = {attr = "box.__version__"}
 
-[tool.distutils.bdist_wheel]
-universal = true
-
 [tool.ruff]
 line-length = 79
 indent-width = 4