chore: Remove certifi dependency from docs (#24)

Author: keelerm84

pyproject.toml

@@ -54,7 +54,6 @@ sphinx = ">=6,<8"
 sphinx-autodoc-typehints = "^1.3.0"
 sphinx-rtd-theme = ">=1.3,<4.0"
 backoff = ">=1.4.3"
-certifi = ">=2018.4.16"
 expiringdict = ">=1.1.4"
 pyrfc3339 = ">=1.0"
 jsonpickle = ">1.4.1"