Anheuser-Busch InBev said on Friday it would sell its stake in Russian joint-venture AB InBev Efes which will result in a $1.1 billion impairment charge in its first quarter results.Anheuser-Busch InBev said on Friday it would sell its stake in Russian joint-venture AB InBev Efes which will result in a $1.1 billion impairment charge in its first quarter results.