Lists: Fix invalid prop usage in RNTesterExampleList

Summary: backgroundColor must be passed in a style prop

Reviewed By: PeteTheHeat

Differential Revision: D17838513

fbshipit-source-id: 315ca144f63e67b0e9db5e705074974372db2f5e

RNTester/js/components/RNTesterExampleList.js

@@ -151,10 +151,6 @@ class RNTesterExampleList extends React.Component<Props, $FlowFixMeState> {
                     automaticallyAdjustContentInsets={false}
                     keyboardDismissMode="on-drag"
                     renderSectionHeader={renderSectionHeader}
-                    backgroundColor={Platform.select({
-                      ios: 'transparent',
-                      default: undefined,
-                    })}
                   />
                 )}
               />