Remove defaultProp references in docs

Author: chris-schneider-zen

docs/api.md

@@ -66,9 +66,6 @@ ensuring the details live up to expectations.
   `${componentStyles}` which allows an implementer to leverage the
   [`theme`](https://zendeskgarden.github.io/react-components/theming/)
   "components" object to override specific component styles.
-- The view component `defaultProps` must contain `theme: DEFAULT_THEME` for
-  cases when the component might be used outside the context of a
-  `<ThemeProvider>`.
 - With the exception of embedded icons, view components do not return JSX.
 
 ## Element components

docs/documentation.md

@@ -41,7 +41,6 @@ the standard rules for Garden element component documentation:
       API](https://garden.zendesk.com/components/select#dropdown) for an
       external linking example
   - Only add prop JSDoc to [TypeScript prop interfaces](typescript.md)
-    - Refrain from documenting React `defaultProps`
     - Refrain from documenting styled components props
   - Use `@ignore` to prevent a prop from being added to generated documentation.
     Use this tag sparingly to hide internal-only APIs.