Remove unused code (#1897)

Author: ota-meshi

lib/rules/no-expose-after-await.js

@@ -161,9 +161,6 @@ module.exports = {
            * @param {Program} node
            */
           Program(node) {
-            context
-              .getScope()
-              .references.find((ref) => ref.identifier.name === 'defineExpose')
             setupScopes.set(node, {
               afterAwait: false,
               range: scriptSetup.range,