fs: remove unused macro

PR-URL: nodejs#17689
Reviewed-By: Anna Henningsen <anna@addaleax.net>

Author: jasnell

src/node_file.cc

@@ -95,10 +95,6 @@ using v8::Object;
 using v8::String;
 using v8::Value;
 
-#ifndef MIN
-# define MIN(a, b) ((a) < (b) ? (a) : (b))
-#endif
-
 #define TYPE_ERROR(msg) env->ThrowTypeError(msg)
 
 #define GET_OFFSET(a) ((a)->IsNumber() ? (a)->IntegerValue() : -1)