remove early returns for async function in component detection

Author: pnodet

lib/util/Components.js

@@ -855,7 +855,7 @@ function componentRule(rule, context) {
     },
 
     FunctionExpression(node) {
-      if (node.async) {
+      if (node.async && node.generator) {
         components.add(node, 0);
         return;
       }
@@ -868,7 +868,7 @@ function componentRule(rule, context) {
     },
 
     FunctionDeclaration(node) {
-      if (node.async) {
+      if (node.async && node.generator) {
         components.add(node, 0);
         return;
       }
@@ -881,11 +881,6 @@ function componentRule(rule, context) {
     },
 
     ArrowFunctionExpression(node) {
-      if (node.async) {
-        components.add(node, 0);
-        return;
-      }
-
       const component = utils.getStatelessComponent(node);
       if (!component) {
         return;