remove duplicate model

app/models/copilot_message.rb

@@ -1,27 +0,0 @@
-# == Schema Information
-#
-# Table name: copilot_messages
-#
-#  id                :bigint           not null, primary key
-#  message           :jsonb            not null
-#  message_type      :string           not null
-#  created_at        :datetime         not null
-#  updated_at        :datetime         not null
-#  account_id        :bigint           not null
-#  copilot_thread_id :bigint           not null
-#  user_id           :bigint           not null
-#
-# Indexes
-#
-#  index_copilot_messages_on_account_id         (account_id)
-#  index_copilot_messages_on_copilot_thread_id  (copilot_thread_id)
-#  index_copilot_messages_on_user_id            (user_id)
-#
-class CopilotMessage < ApplicationRecord
-  belongs_to :copilot_thread
-  belongs_to :user
-  belongs_to :account
-
-  validates :message_type, presence: true, inclusion: { in: %w[user assistant assistant_thinking] }
-  validates :message, presence: true
-end

app/models/copilot_thread.rb

@@ -1,26 +0,0 @@
-# == Schema Information
-#
-# Table name: copilot_threads
-#
-#  id         :bigint           not null, primary key
-#  title      :string           not null
-#  uuid       :uuid             not null
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  account_id :bigint           not null
-#  user_id    :bigint           not null
-#
-# Indexes
-#
-#  index_copilot_threads_on_account_id  (account_id)
-#  index_copilot_threads_on_user_id     (user_id)
-#  index_copilot_threads_on_uuid        (uuid) UNIQUE
-#
-class CopilotThread < ApplicationRecord
-  belongs_to :user
-  belongs_to :account
-  has_many :copilot_messages, dependent: :destroy
-
-  validates :title, presence: true
-  validates :uuid, presence: true, uniqueness: true
-end