Remove autocompletion to deprecated operator

test/livebook/intellisense_test.exs

@@ -360,29 +360,6 @@ defmodule Livebook.IntellisenseTest do
       assert [^regex_item] = Intellisense.get_completion_items("~r", binding, env)
     end
 
-    test "Elixir sigil-like operators" do
-      {binding, env} =
-        eval do
-          import Bitwise
-        end
-
-      bitwise_not_item = %{
-        label: "~~~/1",
-        kind: :function,
-        detail: "~~~expr",
-        documentation: """
-        Bitwise NOT unary operator.
-
-        ```
-        @spec ~~~integer() :: integer()
-        ```\
-        """,
-        insert_text: "~~~"
-      }
-
-      assert bitwise_not_item in Intellisense.get_completion_items("~", binding, env)
-    end
-
     @tag :erl_docs
     test "Erlang function completion" do
       {binding, env} = eval(do: nil)