doc: simplify documentation for function keyNew
*
* To just get a key object, simple do:
*
- * @snippet keyNew.c Simple
+ * @snippet keyNew.c With Name
*
* keyNew() allocates memory for a key object and keyDel() cleans
* everything up.
*
- * We can also give an empty key name and a KEY_END tag with the same
- * effect as before:
- *
- * @snippet keyNew.c Alternative
- *
- * But we can also give the key a proper name right from the start:
- *
- * @snippet keyNew.c With Name
- *
* If you want the key object to contain a name, value, comment and other
* meta info read on.
*
