Stop marking wheels as universal

Hugo Osvaldo Barrera · Hugo Osvaldo Barrera · commit a910e9f446ff · 2021-08-04T00:18:22.000+02:00
We don't support Python 2, so they're not universal.
diff --git a/setup.cfg b/setup.cfg
@@ -1,6 +1,3 @@
-[wheel]
-universal = 1
-
 [tool:pytest]
 addopts =
   --tb=short
