README: credit tutorial participants, drop merged build-* branch section

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

README.md

@@ -133,31 +133,6 @@ install-type archetype and prints the Ra build recipe.
 Members of the `unx-mx_adm` group can update `/opt/psi/MX` directly — no -adm
 account needed. Permission problems: tell the admins.
 
-## Tutorial branches (build-*)
-
-Each participant works on their own `build-<module>` branch (e.g.
-`build-dials`), all starting from `main`.
-
-While a branch is still identical to main (fast-forward):
-
-```bash
-git push origin main:build-dials main:build-buster ...
-for b in dials buster ...; do git branch -f build-$b main; done
-```
-
-Once branches have diverged, merge main into each instead:
-
-```bash
-for b in dials buster ...; do
-  git checkout build-$b && git merge main && git push
-done
-git checkout main
-```
-
-If `git push origin main:build-xxx` fails with "non-fast-forward", the branch
-has its own commits: use the merge loop, never force-push over other people's
-work.
-
 ## Resources
 
 - Buildblock examples: https://github.com/Pmodules/buildblocks/tree/master
@@ -170,3 +145,14 @@ Many thanks to [Achim Gsell](https://www.psi.ch/en/lsm/people/achim-gsell)
 for giving the MX group the tutorial on 2026-08-18, and to
 [Hans Viessmann](https://www.psi.ch/en/awi/people/hans-nikolai-viessmann)
 and Achim for their support.
+
+During the tutorial the following people worked on the modules:
+
+- May — Phenix
+- Filipa — Pymol
+- Emma — CrystFEL
+- Dennis — ccp4
+- Milton — Xtrapol8
+
+Thanks to all of them for their participation and contributions to the
+scripts. As of 2026-08-19, all build* branches have been merged to main.