Build: Remove setuptools-scm dependency

We don't seem to actually be using this, we tag and release.
But there is evidence this is affecting the dist building when
there is no history checkout.

Author: ndevenish

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=61.2", "setuptools-scm"]
+requires = ["setuptools>=61.2"]
 build-backend = "setuptools.build_meta"
 
 [project]