Update branches.yaml

Co-authored-by: Barnabas Busa <barnabas.busa@ethereum.org>
Signed-off-by: Chase Wright <chase.wright@ethereum.org>

Author: MysticRyuujin

branches.yaml

@@ -238,4 +238,3 @@ slashoor:
 trueblocks:
   branches:
     - main
-    - v5.9.3