fix(logger): satisfy biome rules in new prod log tests

Co-authored-by: Theodore Li <TheodoreSpeaks@users.noreply.github.com>

Author: cursoragent

packages/logger/src/index.test.ts

@@ -110,33 +110,33 @@ describe('Logger', () => {
     beforeEach(() => {
       originalNodeEnv = env.NODE_ENV
       originalLogLevel = env.LOG_LEVEL
-      hadWindow = Object.prototype.hasOwnProperty.call(globalRecord, 'window')
+      hadWindow = Object.hasOwn(globalRecord, 'window')
       originalWindow = globalRecord.window
     })
 
     afterEach(() => {
       if (originalNodeEnv === undefined) {
-        delete env.NODE_ENV
+        env.NODE_ENV = undefined
       } else {
         env.NODE_ENV = originalNodeEnv
       }
 
       if (originalLogLevel === undefined) {
-        delete env.LOG_LEVEL
+        env.LOG_LEVEL = undefined
       } else {
         env.LOG_LEVEL = originalLogLevel
       }
 
       if (hadWindow) {
         globalRecord.window = originalWindow
       } else {
-        delete globalRecord.window
+        globalRecord.window = undefined
       }
     })
 
     test('logs info by default in production on server', () => {
       env.NODE_ENV = 'production'
-      delete env.LOG_LEVEL
+      env.LOG_LEVEL = undefined
 
       const logger = createLogger('ProdServer')
       logger.debug('debug message')
@@ -167,7 +167,7 @@ describe('Logger', () => {
 
     test('does not log in production browser runtime', () => {
       env.NODE_ENV = 'production'
-      delete env.LOG_LEVEL
+      env.LOG_LEVEL = undefined
       globalRecord.window = {}
 
       const logger = createLogger('ProdBrowser')