stream: remove dead code

`String.prototype.split()` returns an array of strings so the branch is
never taken.
Fixes: #30040
PR-URL: #30041
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

Author: lpinca

lib/stream.js

@@ -43,23 +43,18 @@ Stream.Stream = Stream;
 
 Stream._isUint8Array=require('internal/util/types').isUint8Array;
 
-constversion=process.version.substr(1).split('.');
-if(version[0]===0&&version[1]<12){
-Stream._uint8ArrayToBuffer=Buffer;
-}else{
-try{
-constinternalBuffer=require('internal/buffer');
-Stream._uint8ArrayToBuffer=function_uint8ArrayToBuffer(chunk){
-returnnewinternalBuffer.FastBuffer(chunk.buffer,
-chunk.byteOffset,
-chunk.byteLength);
-};
-}catch(e){// eslint-disable-line no-unused-vars
-}
+try{
+constinternalBuffer=require('internal/buffer');
+Stream._uint8ArrayToBuffer=function_uint8ArrayToBuffer(chunk){
+returnnewinternalBuffer.FastBuffer(chunk.buffer,
+chunk.byteOffset,
+chunk.byteLength);
+};
+}catch(e){// eslint-disable-line no-unused-vars
+}
 
-if(!Stream._uint8ArrayToBuffer){
-Stream._uint8ArrayToBuffer=function_uint8ArrayToBuffer(chunk){
-returnBuffer.prototype.slice.call(chunk);
-};
-}
+if(!Stream._uint8ArrayToBuffer){
+Stream._uint8ArrayToBuffer=function_uint8ArrayToBuffer(chunk){
+returnBuffer.prototype.slice.call(chunk);
+};
 }