How to remove meta data

Question

How do you remove meta data from a node? I can't find any remove_meta() function.

Answer 1

Browsing Godot's source code gives you the answer. It isn't very clear at first, but setting the value to null erases the key.

From godot/object.cpp:L1048 (blob from the 3.1 branch):

if (p_value.get_type() == Variant::NIL) {
    metadata.erase(p_name);
    return;
};

EDIT Switched the blob to the 3.1 branch for accuracy.