[jvm] Redundant ordinal check in enum equals

[Simn]

Looking at what I posted in SomeRanDev/reflaxe.CSharp#2 (comment) again, I noticed this:

        public boolean equals(Enum other) {
            if (!(other instanceof Option.Some)) {
                return false;
            } else {
                Option.Some other = (Option.Some)other;
                if (other.ordinal() != this.ordinal()) {
                    return false;
                } else {
                    return Jvm.maybeEnumEq(other.v, this.v);
                }
            }
        }

The if (other.ordinal() != this.ordinal()) check seems redundant because we already know that enums of the same class have the same ordinal by design.