[InlineWrapper]: Don't force any width on the paper (mui#1248) (mui#1261

)

Fixes mui#1243

lib/src/wrappers/InlineWrapper.tsx

@@ -1,25 +1,9 @@
 import * as React from 'react';
 import * as PropTypes from 'prop-types';
-import clsx from 'clsx';
 import Popover, { PopoverProps as PopoverPropsType } from '@material-ui/core/Popover';
 import { WrapperProps } from './Wrapper';
-import { makeStyles } from '@material-ui/core/styles';
 import { useKeyDown } from '../_shared/hooks/useKeyDown';
 import { TextFieldProps } from '@material-ui/core/TextField';
-import { DIALOG_WIDTH, DIALOG_WIDTH_WIDER } from '../constants/dimensions';
-
-export const useStyles = makeStyles(
-  {
-    popoverPaper: {
-      width: DIALOG_WIDTH,
-      paddingBottom: 8,
-    },
-    popoverPaperWider: {
-      width: DIALOG_WIDTH_WIDER,
-    },
-  },
-  { name: 'MuiPickersInlineWrapper' }
-);
 
 export interface InlineWrapperProps<T = TextFieldProps> extends WrapperProps<T> {
   /** Popover props passed to material-ui Popover (with variant="inline") */
@@ -41,7 +25,6 @@ export const InlineWrapper: React.FC<InlineWrapperProps> = ({
   ...other
 }) => {
   const ref = React.useRef();
-  const classes = useStyles();
 
   useKeyDown(open, {
     Enter: onAccept,
@@ -55,9 +38,6 @@ export const InlineWrapper: React.FC<InlineWrapperProps> = ({
         open={open}
         onClose={onDismiss}
         anchorEl={ref.current}
-        classes={{
-          paper: clsx(classes.popoverPaper, { [classes.popoverPaperWider]: wider }),
-        }}
         anchorOrigin={{
           vertical: 'bottom',
           horizontal: 'center',