Remove universal wheel distribution

Since universal wheels are only to support Python 2 and we no longer support Python 2, we can make the distribution a regular wheel again.

Reverts #17 after valiantly supporting Python 2 for several years.

Fixes #100.

Author: JoshData

README.md

@@ -421,6 +421,3 @@ To release:
 git tag v$(grep version setup.cfg | sed "s/.*= //")
 git push --tags
 ```
-
-Notes: The wheel is specified as universal in the file `setup.cfg` by the `universal = 1` key in the
-`[bdist_wheel]` section.

setup.cfg

@@ -36,9 +36,6 @@ python_requires = >=3.7
 console_scripts =
     email_validator=email_validator:main
 
-[bdist_wheel]
-universal = 1
-
 [flake8]
 max-line-length = 120