chore(sync-service): Fix test warnings (#3287)

Author: robacourt

packages/sync-service/test/electric/replication/publication_manager_test.exs

@@ -6,17 +6,11 @@ defmodule Electric.Replication.PublicationManagerTest do
   import Support.TestUtils
 
   alias Electric.Replication.PublicationManager
-  alias Electric.Shapes.Shape
 
   @shape_handle_1 "shape_handle_1"
   @shape_handle_2 "shape_handle_2"
   @shape_handle_3 "shape_handle_3"
 
-  @inspector Support.StubInspector.new(
-               tables: [{1234, {"public", "items"}}],
-               columns: [%{name: "id", type: "int8", pk_position: 0}]
-             )
-
   setup [
     :with_stack_id_from_test,
     :with_in_memory_storage,