Tidy up old dependencies

Author: dihm

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=64", "wheel", "setuptools_scm>=8", "cython"]
+requires = ["setuptools>=64", "setuptools_scm>=8"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]
@@ -25,17 +25,10 @@ license = {file = 'LICENSE.txt'}
 classifiers = [
     "License :: OSI Approved :: BSD License",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.6",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
 ]
-requires-python = ">=3.6"
+requires-python = ">=3.8"
 dependencies = [
     "desktop-app>=0.1.2",
-    "importlib_metadata",
     "labscript_utils>=3.1.0b1",
     "labscript-c-extensions",
     "pyqtgraph>=0.11.1",