Bug 1289211 - Remove InfallibleTArray alias r=erahm

Differential Revision: https://phabricator.services.mozilla.com/D36973

--HG--
extra : moz-landing-system : lando

xpcom/ds/nsTArrayForwardDeclare.h

@@ -30,7 +30,4 @@ class FallibleTArray;
 template <class E, size_t N>
 class AutoTArray;
 
-template <class E>
-using InfallibleTArray = nsTArray<E>;
-
 #endif