jobs/ttcn3-testsuites-kernel-git: remove wrong comment

Here, the job names are not the same as the directory names of
docker-playground.git

Related: OS#3208
Change-Id: Idbcb7267ce38cbdc2df5631df404f908487f827b

jobs/ttcn3-testsuites-kernel-git.yml

@@ -12,7 +12,6 @@
     wipe_workspace: false
     jobs:
       - "{job-name}"
-    # Folders from docker-playground.git
     job-name:
       - ttcn3-ggsn-test-kernel-git:
           blocking: "^(ttcn3|TTCN3-.*)-ggsn-test.*"