refactor(core): Move __DEV__ guard to call site in sdk.tsx

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: antonis

packages/core/src/js/sdk.tsx

@@ -173,7 +173,9 @@ export function init(passedOptions: ReactNativeOptions): void {
     defaultIntegrations,
   });
   initAndBind(ReactNativeClient, options);
-  checkSentryJsSdkVersionMismatch();
+  if (__DEV__) {
+    checkSentryJsSdkVersionMismatch();
+  }
 
   if (isExpoGo()) {
     debug.log('Offline caching, native errors features are not available in Expo Go.');

packages/core/src/js/utils/sdkVersionCheck.ts

@@ -1,10 +1,6 @@
 import { debug, getMainCarrier, SDK_VERSION as CORE_SDK_VERSION } from '@sentry/core';
 
 export function checkSentryJsSdkVersionMismatch(): void {
-  if (!__DEV__) {
-    return;
-  }
-
   try {
     const carrier = getMainCarrier();
     const sentryCarrier = carrier.__SENTRY__;

packages/core/test/utils/sdkVersionCheck.test.ts

@@ -62,21 +62,6 @@ describe('checkSentryJsSdkVersionMismatch', () => {
     expect(mockDebugWarn).not.toHaveBeenCalled();
   });
 
-  it('does not warn in production builds', () => {
-    // @ts-expect-error -- __DEV__ is a RN global
-    globalThis.__DEV__ = false;
-    try {
-      mockCarrier.__SENTRY__ = { '10.0.0': {}, '9.0.0': {} };
-
-      checkSentryJsSdkVersionMismatch();
-
-      expect(mockDebugWarn).not.toHaveBeenCalled();
-    } finally {
-      // @ts-expect-error -- __DEV__ is a RN global
-      globalThis.__DEV__ = true;
-    }
-  });
-
   it('does not throw on unexpected errors', () => {
     Object.defineProperty(mockCarrier, '__SENTRY__', {
       get() {