diff --git a/docs/src/pages/components/buttons/buttons.md b/docs/src/pages/components/buttons/buttons.md
index b6df6213d1d98f..d236b6e0f114dd 100644
--- a/docs/src/pages/components/buttons/buttons.md
+++ b/docs/src/pages/components/buttons/buttons.md
@@ -21,8 +21,6 @@ components: Button, ButtonGroup, Fab, IconButton, ButtonBase, Zoom
 are high-emphasis, distinguished by their use of elevation and fill.
 They contain actions that are primary to your app.
 
-The last example of this demo show how to use an upload button.
-
 {{"demo": "pages/components/buttons/ContainedButtons.js"}}
 
 You can remove the elevation with the `disableElevation` prop.
diff --git a/docs/src/pages/components/rating/HoverRating.js b/docs/src/pages/components/rating/HoverRating.js
index 891f146af0bd65..23e3f26ffe753d 100644
--- a/docs/src/pages/components/rating/HoverRating.js
+++ b/docs/src/pages/components/rating/HoverRating.js
@@ -1,5 +1,4 @@
 import React from 'react';
-import PropTypes from 'prop-types';
 import { makeStyles } from '@material-ui/core/styles';
 import Rating from '@material-ui/lab/Rating';
 import Tooltip from '@material-ui/core/Tooltip';
@@ -28,10 +27,6 @@ function IconContainer(props) {
   );
 }
 
-IconContainer.propTypes = {
-  value: PropTypes.number.isRequired,
-};
-
 const useStyles = makeStyles({
   rating1: {
     width: 200,