test: delete test_id_is_shown_in_alerts as unnecessary

This test expected alert for non-vshard replica to be shown, which is
incorrect behavior and will be fixed in the subsequent commit.

Needed for tarantool#493

NO_DOC=test

Author: mrForza

test/storage-luatest/persistent_names_test.lua

@@ -136,28 +136,3 @@ test_group.test_no_unreachable_replica_alert = function(g)
     asserts:assert_server_no_alerts(g.replica_2_a)
     persistent_names_restore(g, names)
 end
-
---
--- vshard didn't show proper identificator of a replica, when names are
--- not set and 'name_as_key' identification_mode is used.
---
-test_group.test_id_is_shown_in_alerts = function(g)
-    -- Connect any kind of replica, non-anonymous CDC or replica in shard.
-    local box_cfg = {replication = {g.replica_1_a.net_box_uri}}
-    local replica = server:new{alias = 'some-replica', box_cfg = box_cfg}
-    replica:start()
-    replica:wait_for_vclock_of(g.replica_1_a)
-    local id = replica:instance_id()
-    replica:stop()
-
-    g.replica_1_a:exec(function(id)
-        ilt.assert_equals(ivshard.storage.info().alerts[1][2],
-                          ("Replica %s isn't active"):format(id))
-    end, {id})
-
-    replica:drop()
-    g.replica_1_a:exec(function(id)
-        box.space._cluster:delete(id)
-    end, {id})
-    asserts:assert_server_no_alerts(g.replica_1_a)
-end