Bug 1710816 - Enable HTTP/3 by default r=necko-reviewers,kershaw

Differential Revision: https://phabricator.services.mozilla.com/D114956

modules/libpref/init/all.js

@@ -1418,11 +1418,7 @@ pref("network.http.spdy.websockets", true);
 pref("network.http.spdy.enable-hpack-dump", false);
 
 // Http3 parameters
-#if defined(EARLY_BETA_OR_EARLIER)
 pref("network.http.http3.enabled", true);
-#else
-pref("network.http.http3.enabled", false);
-#endif
 
 // Http3 qpack table size.
 pref("network.http.http3.default-qpack-table-size", 65536); // 64k