Function yrs::yxmltext_remove_attr

#[no_mangle]
pub unsafe extern "C" fn yxmltext_remove_attr(
    txt: *const XmlText, 
    txn: *mut Transaction, 
    attr_name: *const c_char
)

Removes an attribute from a current YXmlText, given its name.

An attr_namemust be a null-terminated UTF-8 encoded string.