How to remove big Facebooklogo in the starting of Application using omniauth gem

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Rails.application.config.middleware.use OmniAuth::Builder do     provider :facebook, 'YOURAPPID', 'YOURAPPSECRET',           :iframe => true,     :scope => "publish_stream,email,user_education_history" end  # add this OmniAuth.config.full_host = 'http://apps.facebook.com/yourapp/'

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