Remove deprecated GET /api/v1/search API (#11823)

Use `GET /api/v2/search` instead

spec/controllers/api/v1/search_controller_spec.rb

@@ -1,22 +0,0 @@
-# frozen_string_literal: true
-
-require 'rails_helper'
-
-RSpec.describe Api::V1::SearchController, type: :controller do
-  render_views
-
-  let(:user)  { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
-  let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: 'read:search') }
-
-  before do
-    allow(controller).to receive(:doorkeeper_token) { token }
-  end
-
-  describe 'GET #index' do
-    it 'returns http success' do
-      get :index, params: { q: 'test' }
-
-      expect(response).to have_http_status(200)
-    end
-  end
-end