By Emma-Victoria Farr FRANKFURT (Reuters) -German sporting goods maker Adidas on Thursday cut its full-year guidance, citing weaker expectations for China, lower demand in major Western markets and one-off expenses related to its exit from the Russian market. The company now expects currency-neutral revenues to grow by a mid-single-digit percentage in 2022, down from a mid- to high-single-digit percentage forecast previously, while its operating margin is seen at 4%, down from 7%. The company blamed a “further deterioration of traffic trends in Greater China, as well as a significant inventory…