3bdbdae Remove unnecessary code from process_message

Authored and Committed by cqi 4 years ago
    Remove unnecessary code from process_message
    
    It is not necessary to initialize the build variable before following
    if-elif-else branch.
    
    After the if-elif-else branch, if no build is found, process_message
    just returns immediately. So, no need to check if build is None during
    handling error raised from handler call.
    
    Signed-off-by: Chenxiong Qi <cqi@redhat.com>