Revert D5932093: [RAMBO] Final fixes

Differential Revision: D5932093

fbshipit-source-id: 8e6ac0482a4c5a9ae4549be73d316df919613c9b

ReactCommon/cxxreact/JSCExecutor.cpp

@@ -651,7 +651,7 @@ namespace facebook {
     void JSCExecutor::loadModule(uint32_t bundleId, uint32_t moduleId) {
       auto module = m_bundleRegistry->getModule(bundleId, moduleId);
       auto sourceUrl = String::createExpectingAscii(m_context, module.name);
-      auto source = adoptString(std::unique_ptr<JSBigString>(new JSBigStdString(module.code)));
+      auto source = String::createExpectingAscii(m_context, module.code);
       evaluateScript(m_context, source, sourceUrl);
     }