Remove undefined sanitizer from project.yaml

Removed 'undefined' from the sanitizers list in project.yaml.

Author: DavidKorczynski

projects/bind9/project.yaml

@@ -12,7 +12,6 @@ auto_ccs:
   - "pspacek@isc.org"
 sanitizers:
   - address
-  - undefined
 main_repo: 'https://gitlab.isc.org/isc-projects/bind9.git'
 
 fuzzing_engines: