fix: init devtools after feature flag checks

packages/vue/src/dev.ts

@@ -1,12 +1,6 @@
-import { setDevtoolsHook, initCustomFormatter } from '@vue/runtime-dom'
-import { getGlobalThis } from '@vue/shared'
+import { initCustomFormatter } from '@vue/runtime-dom'
 
 export function initDev() {
-  const target = getGlobalThis()
-
-  target.__VUE__ = true
-  setDevtoolsHook(target.__VUE_DEVTOOLS_GLOBAL_HOOK__)
-
   if (__BROWSER__) {
     if (!__ESM_BUNDLER__) {
       console.info(

packages/vue/src/index.ts

@@ -7,7 +7,7 @@ import * as runtimeDom from '@vue/runtime-dom'
 import { isString, NOOP, generateCodeFrame, extend } from '@vue/shared'
 import { InternalRenderFunction } from 'packages/runtime-core/src/component'
 
-if (__DEV__ || __FEATURE_PROD_DEVTOOLS__) {
+if (__DEV__) {
   initDev()
 }
 

packages/vue/src/runtime.ts

@@ -3,7 +3,7 @@
 import { initDev } from './dev'
 import { warn } from '@vue/runtime-dom'
 
-if (__DEV__ || __FEATURE_PROD_DEVTOOLS__) {
+if (__DEV__) {
   initDev()
 }