Bug 1618251 - Remove the duplicated call to GetKeyForPrincipal() which got added during rebasing; r=baku

Differential Revision: https://phabricator.services.mozilla.com/D64404

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

extensions/permissions/nsPermissionManager.cpp

@@ -3249,7 +3249,6 @@ nsPermissionManager::GetAllKeysForPrincipal(nsIPrincipal* aPrincipal) {
     // Add the pair to the list
     Pair<nsCString, nsCString>* pair =
         pairs.AppendElement(MakePair(EmptyCString(), EmptyCString()));
-    GetKeyForPrincipal(prin, false, pair->first());
     // We can't check for individual OA strip perms here.
     // Don't force strip origin attributes.
     GetKeyForPrincipal(prin, false, pair->first());