doc: remove link to QUIC.md

Author: aduh95

doc/api/index.md

@@ -49,7 +49,6 @@
 * [Process](process.md)
 * [Punycode](punycode.md)
 * [Query strings](querystring.md)
-* [QUIC](quic.md)
 * [Readline](readline.md)
 * [REPL](repl.md)
 * [Report](report.md)