Remove deployment to pypi from .travis

For GitHub actions testing, let's remove
pypi deployment from travis.

.travis.yml

@@ -22,13 +22,3 @@ matrix:
 script: tox -e $TOX_ENV
 after_success:
 - test $TOX_ENV = docs && scripts/push-docs
-
-deploy:
-  provider: pypi
-  user: __token__
-  password:
-    secure: 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
-  on:
-    tags: true
-    condition: "$DEPLOY = 1"
-  skip_existing: true