src: remove unused base64_table_url

PR-URL: #53040
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>

Author: anonrig

src/base64-inl.h

@@ -8,10 +8,6 @@
 
 namespace node {
 
-static constexpr char base64_table_url[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-                                           "abcdefghijklmnopqrstuvwxyz"
-                                           "0123456789-_";
-
 extern const int8_t unbase64_table[256];