Simplify getOpenapiResponseProperties

Author: andrii-balitskyi

src/lib/report.ts

@@ -320,18 +320,16 @@ function processResponseKeys(endpoint: Endpoint, report: Report): void {
 
 function getOpenapiResponseProperties(
   path: string,
-): Record<string, unknown> | undefined | null {
+): Record<string, unknown> | null {
   const openapiEndpointDef = openapi.paths[path as keyof typeof openapi.paths]
 
   if (openapiEndpointDef == null) {
     // eslint-disable-next-line no-console
     console.warn(`OpenAPI definition not found for endpoint: ${path}`)
-    return undefined
+    return null
   }
 
-  if (openapiEndpointDef.post?.responses == null) {
-    return undefined
-  }
+  if (openapiEndpointDef.post?.responses == null) return null
 
   const responseObj = openapiEndpointDef.post.responses['200']
 
@@ -346,7 +344,7 @@ function getOpenapiResponseProperties(
     }
   }
 
-  return undefined
+  return null
 }
 
 function processParameters(