Revert "lib: optimize writable stream buffer clearing"

This reverts commit 8a2fec1. PR-URL: #59743 Reviewed-By: Mattias Buelens <[email protected]> Reviewed-By: Robert Nagy <[email protected]> Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Ethan Arrowood <[email protected]>

Author: ri7116

lib/internal/streams/writable.js

@@ -784,7 +784,7 @@ function clearBuffer(stream, state){
 if(i===buffered.length){
 resetBuffer(state);
 }elseif(i>256){
-state[kBufferedValue]=ArrayPrototypeSlice(buffered,i);
+buffered.splice(0,i);
 state.bufferedIndex=0;
 }else{
 state.bufferedIndex=i;