refactor: simplify static content insertion

packages/runtime-core/src/vnode.ts

@@ -168,7 +168,6 @@ export interface VNode<
   target: HostElement | null // teleport target
   targetAnchor: HostNode | null // teleport target anchor
   staticCount?: number // number of elements contained in a static vnode
-  staticCache?: HostNode[] // cache of parsed static nodes for faster repeated insertions
 
   // suspense
   suspense: SuspenseBoundary | null
@@ -521,7 +520,6 @@ export function cloneVNode<T, U>(
     target: vnode.target,
     targetAnchor: vnode.targetAnchor,
     staticCount: vnode.staticCount,
-    staticCache: vnode.staticCache,
     shapeFlag: vnode.shapeFlag,
     // if the vnode is cloned with extra props, we can no longer assume its
     // existing patch flag to be reliable and need to add the FULL_PROPS flag.