tox-uv is not needed to run tests in our environment.

--- pyproject_api-1.12.4/tox.toml.orig
+++ pyproject_api-1.12.4/tox.toml
@@ -1,4 +1,4 @@
-requires = [ "tox>=4.64.7", "tox-uv>=1.36.1" ]
+requires = [ "tox>=4.64.7" ]
 env_list = [ "3.15", "3.14", "3.13", "3.12", "3.11", "3.15t", "docs", "fix", "pkg_meta", "type" ]
 skip_missing_interpreters = true