Fix propTypes warnings (#5285)

app/components/markdown/markdown_code_block/markdown_code_block.js

@@ -12,7 +12,6 @@ import {
 } from 'react-native';
 import Clipboard from '@react-native-community/clipboard';
 
-import CustomPropTypes from '@constants/custom_prop_types';
 import FormattedText from 'app/components/formatted_text';
 import TouchableWithFeedback from 'app/components/touchable_with_feedback';
 import BottomSheet from 'app/utils/bottom_sheet';
@@ -29,7 +28,7 @@ export default class MarkdownCodeBlock extends React.PureComponent {
         theme: PropTypes.object.isRequired,
         language: PropTypes.string,
         content: PropTypes.string.isRequired,
-        textStyle: CustomPropTypes.Style,
+        textStyle: PropTypes.oneOfType([PropTypes.object, PropTypes.number, PropTypes.array]),
     };
 
     static defaultProps = {