Merge pull request #180 from stanislavlevin/issue_179

Drop no longer used runtime dependency on PyYAML

Author: p1c2u

pyproject.toml

@@ -47,7 +47,6 @@ classifiers = [
 jsonschema = "^4.0.0"
 openapi-schema-validator = "^0.3.2"
 python = "^3.7.0"
-PyYAML = ">=5.1"
 requests = {version = "*", optional = true}
 importlib-resources = {version = "^5.8.0", python = "<3.9" }
 jsonschema-spec = "^0.1.1"