remove abstract method
Removes a key value pair from the TraceState.
Key is an opaque string up to 256 characters printable. It MUST begin with a lowercase letter, and can only contain lowercase letters a-z, digits 0-9, underscores _, dashes -, asterisks *, and forward slashes /. For multi-tenant vendor scenarios, an at sign (@) can be used to prefix the vendor name. The tenant id (before the '@') is limited to 240 characters and the vendor id is limited to 13 characters. If in the multi-tenant vendor format, then the first character may additionally be numeric.
Implementation
void remove(String key);