Revert D119305530: Clone ObjectMethod before toExpression in preset

Differential Revision:
D119305530

Original commit changeset: dd30a94e91ed

Original Phabricator Diff: D119305530

fbshipit-source-id: a38c93b5f7949126f0a33f801f77b01c574e13a3

Author: generatedunixname89002005232357

packages/react-native-babel-preset/src/__tests__/inline-platform-plugin-test.js

@@ -493,15 +493,6 @@ describe('Platform.select', () => {
     `);
   });
 
-  test('does not mutate object methods when bailing out on impure initializers', () => {
-    expectUnchanged(`
-      const value = require('react-native').Platform.select({
-        ios() { return 1; },
-        android: sideEffect(),
-      });
-    `);
-  });
-
   test('does not inline computed keys', () => {
     expect(select('{[key]: 1, default: 2}')).toContain('Platform.select');
   });

packages/react-native-babel-preset/src/inline-platform-plugin.js

@@ -443,9 +443,7 @@ module.exports = function inlinePlatformPlugin(
         if (t.isObjectProperty(property)) {
           return property.value;
         }
-        // Clone: toExpression mutates in place, e.g. `ios() {}` would be
-        // left mutated if the purity check below bails out.
-        return t.toExpression(t.cloneNode(property));
+        return t.toExpression(property);
       }
     }
     return fallback();