fixed warnings

Author: zookzook

lib/mongo/messages.ex

@@ -133,7 +133,7 @@ defmodule Mongo.Messages do
       BSON.Encoder.document(query),
       select]
   end
-  defp encode_op(op_msg(flags: flags, sections: sections)) do
+  defp encode_op(op_msg(flags: _flags, sections: sections)) do
     # todo: flags encoding
     [<<0::int32>> | encode_sections(sections)]
   end

lib/mongo/query.ex

@@ -15,7 +15,7 @@ end
 defimpl DBConnection.Query, for: Mongo.Query do
   def parse(query, _opts), do: query
   def describe(query, _opts), do: query
-  def encode(query, params, _opts), do: params
+  def encode(_query, params, _opts), do: params
   def decode(_query, :ok, _opts), do: :ok
   def decode(_query, wire_version, _opts) when is_integer(wire_version), do: wire_version
   def decode(_query, reply, _opts), do: reply

lib/mongo/unordered_bulk.ex

@@ -52,7 +52,6 @@ defmodule Mongo.UnorderedBulk do
   alias Mongo.BulkWrite
 
   import Mongo.BulkOps
-  import Mongo.Utils
 
   @type t :: %__MODULE__{
                coll: String.t,