cleanups

src/setuptools_dso/dsocmd.py

 import sys
 import os
-import platform
-import glob
 
 from collections import defaultdict
 from importlib import import_module # say that three times fast...
@@ -228,7 +226,6 @@ class build_dso(dso2libmixin, Command):
         self.force = None
 
     def finalize_options(self):
-        from distutils import sysconfig
 
         self.set_undefined_options('build_ext',
                                    ('build_lib', 'build_lib'),

src/setuptools_dso/probe.py

@@ -108,7 +108,7 @@ class ProbeToolchain(object):
         try:
             self.compile(src, **kws)
             return True
-        except (DistutilsExecError, CompileError) as e:
+        except (DistutilsExecError, CompileError):
             return False
 
     def check_includes(self, headers, **kws):