Removed UMD target from react-is bundle

Author: bvaughn

scripts/rollup/bundles.js

@@ -238,7 +238,7 @@ const bundles = [
   /******* React Is *******/
   {
     label: 'react-is',
-    bundleTypes: [UMD_DEV, UMD_PROD, NODE_DEV, NODE_PROD],
+    bundleTypes: [NODE_DEV, NODE_PROD],
     moduleType: ISOMORPHIC,
     entry: 'react-is',
     global: 'ReactIs',

scripts/rollup/results.json

@@ -399,20 +399,6 @@
       "size": 41327,
       "gzip": 13133
     },
-    {
-      "filename": "react-is.development.js",
-      "bundleType": "UMD_DEV",
-      "packageName": "react-is",
-      "size": 3760,
-      "gzip": 1086
-    },
-    {
-      "filename": "react-is.production.min.js",
-      "bundleType": "UMD_PROD",
-      "packageName": "react-is",
-      "size": 1641,
-      "gzip": 687
-    },
     {
       "filename": "react-is.development.js",
       "bundleType": "NODE_DEV",