Enable setuptools-scm and remove useless MANIFEST.in

Author: leplatrem

MANIFEST.in

@@ -25,6 +25,9 @@ kinto-send-email = "kinto_emailer.command_send:main"
 [tool.setuptools.dynamic]
 dependencies = { file = ["requirements.in"] }
 
+[tool.setuptools_scm]
+# can be empty if no extra settings are needed, presence enables setuptools_scm
+
 [build-system]
 requires = ["setuptools>=64", "setuptools_scm>=8"]
 build-backend = "setuptools.build_meta"