fix: do not drop SFC runtime behavior code in global builds

fix #873

packages/runtime-core/src/helpers/scopeId.ts

@@ -8,28 +8,20 @@ export let currentScopeId: string | null = null
 const scopeIdStack: string[] = []
 
 export function pushScopeId(id: string) {
-  if (__BUNDLER__) {
-    scopeIdStack.push((currentScopeId = id))
-  }
+  scopeIdStack.push((currentScopeId = id))
 }
 
 export function popScopeId() {
-  if (__BUNDLER__) {
-    scopeIdStack.pop()
-    currentScopeId = scopeIdStack[scopeIdStack.length - 1] || null
-  }
+  scopeIdStack.pop()
+  currentScopeId = scopeIdStack[scopeIdStack.length - 1] || null
 }
 
 export function withScopeId(id: string): <T extends Function>(fn: T) => T {
-  if (__BUNDLER__) {
-    return ((fn: Function) =>
-      withCtx(function(this: any) {
-        pushScopeId(id)
-        const res = fn.apply(this, arguments)
-        popScopeId()
-        return res
-      })) as any
-  } else {
-    return undefined as any
-  }
+  return ((fn: Function) =>
+    withCtx(function(this: any) {
+      pushScopeId(id)
+      const res = fn.apply(this, arguments)
+      popScopeId()
+      return res
+    })) as any
 }