SPIGOT-7652: Remove remap for SPELL_MOB_AMBIENT which no longer exists

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/util/Commodore.java

@@ -271,14 +271,6 @@ public class Commodore {
                             }
                         }
 
-                        if (owner.equals("org/bukkit/Particle")) {
-                            switch (name) {
-                                case "SPELL_MOB_AMBIENT":
-                                    super.visitFieldInsn(opcode, owner, "SPELL_MOB", desc);
-                                    return;
-                            }
-                        }
-
                         super.visitFieldInsn(opcode, owner, name, desc);
                     }