Remove custom animations from Bottom-Sheet (#18782)

This fixes a crash on iOS described here: wordpress-mobile/gutenberg-mobile#12

packages/components/src/mobile/bottom-sheet/index.native.js

@@ -1,7 +1,7 @@
 /**
  * External dependencies
  */
-import { Text, View, Platform, PanResponder, Dimensions, Easing } from 'react-native';
+import { Text, View, Platform, PanResponder, Dimensions } from 'react-native';
 import Modal from 'react-native-modal';
 import SafeArea from 'react-native-safe-area';
 
@@ -98,38 +98,13 @@ class BottomSheet extends Component {
 			</View>
 		);
 
-		const { height } = Dimensions.get( 'window' );
-		const easing = Easing.bezier( 0.450, 0.000, 0.160, 1.020 );
-
-		const animationIn = {
-			easing,
-			from: {
-				translateY: height,
-			},
-			to: {
-				translateY: 0,
-			},
-		};
-
-		const animationOut = {
-			easing,
-			from: {
-				translateY: 0,
-			},
-			to: {
-				translateY: height,
-			},
-		};
-
 		const backgroundStyle = getStylesFromColorScheme( styles.background, styles.backgroundDark );
 
 		return (
 			<Modal
 				isVisible={ isVisible }
 				style={ styles.bottomModal }
-				animationIn={ animationIn }
 				animationInTiming={ 600 }
-				animationOut={ animationOut }
 				animationOutTiming={ 250 }
 				backdropTransitionInTiming={ 50 }
 				backdropTransitionOutTiming={ 50 }