Revert "Move react to peerDependencies"

This reverts commit 9f01f96770.

local-cli/generator/index.js

@@ -82,13 +82,5 @@ module.exports = yeoman.generators.NamedBase.extend({
         {name: this.name}
       );
     }
-  },
-
-  install: function() {
-    if (this.options.upgrade) {
-      return;
-    }
-
-    this.npmInstall('react', { '--save': true });
   }
 });

local-cli/upgrade/upgrade.js

@@ -44,19 +44,6 @@ module.exports = function upgrade(args, config) {
               'https://github.com/facebook/react-native/releases/tag/v' + semver.major(v) + '.' + semver.minor(v) + '.0'
             )
           );
-
-          // >= v0.21.0, we require react to be a peer depdendency
-          if (semver.gte(v, '0.21.0') && !pak.dependencies['react']) {
-            console.log(
-              chalk.yellow(
-                '\nYour \'package.json\' file doesn\'t seem to have \'react\' as a dependency.\n' +
-                '\'react\' was changed from a dependency to a peer dependency in react-native v0.21.0.\n' +
-                'Therefore, it\'s necessary to include \'react\' in your project\'s dependencies.\n' +
-                'Just run \'npm install --save react\', then re-run \'react-native upgrade\'.\n'
-              )
-            );
-            return Promise.resolve();
-          }
         } else {
           console.log(
             chalk.yellow(