clean up Luna's chat some more

src/chats/serenity.yaml

@@ -720,7 +720,6 @@
       - Just 滚开.
       - goto: EXIT
 - What are you up to?:
-  - set: grateful 0
   - Tinkering on various projects and running a workshop. Come by if you need any repairs!
   - What kind of projects?:
     - A tuned MotorAce spaceship, an impact dampener, and... a secret project.
@@ -795,12 +794,6 @@
     - Thanks!
     - goto: entrypoint
 - What brings you here?:
-  - set: grateful 0
-  - if $thinking:
-    - As said, I don't like people.
-  - if ~$thinking:
-    - Well, uh...
-    - set: thinking
   - Don't take it personally, but...
   - I don't really like people.
   - Don't get me wrong, I'm happy to help you.
@@ -810,7 +803,6 @@
   - I just want to get away from all this insanity...
   - Just want to tinker without anyone bothering me.
 - You're wearing cat ears!:
-  - set: grateful 0
   - msg: Meowwww!
     sound: cat
   - Yes.
@@ -819,7 +811,6 @@
   - No.
   - I'm a bit busy here.
 - Bye!:
-  - set: grateful 0
   - label: bye
   - So long, drifter!
   - goto: EXIT