meta: exclude custom CODEOWNERS (#32)

Co-authored-by: Justin Beckwith <justin.beckwith@gmail.com>

Author: Benjamin E. Coe

synth.py

@@ -36,7 +36,7 @@
 common_templates = gcp.CommonTemplates()
 templates = common_templates.node_library(
  source_location='build/src', versions=['v1beta1'])
-s.copy(templates, excludes=[])
+s.copy(templates, excludes=[".github/CODEOWNERS"])
 
 node.postprocess_gapic_library()