Other: remove .astyle config.
Other: remove .astyle config.

astyle was used previously to format the code, rabbitmq-c is standarizing on
clang-format for code-styling needs.

Haster2004/rabbitmq-c,alanxz/rabbitmq-c,alanxz/rabbitmq-c,Haster2004/rabbitmq-c,alanxz/rabbitmq-c,Haster2004/rabbitmq-c