minor #1878 Remove subtree splits check (fabpot)

This PR was squashed before being merged into the 2.x branch.

Discussion
----------

Remove subtree splits check

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Issues        | n/a <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

Commits
-------

e02c3fc Remove subtree splits check

Author: kbond

.github/sync-packages.php

@@ -1,6 +1,7 @@
+/.gitattributes export-ignore
+/.gitignore export-ignore
 /.symfony.bundle.yaml export-ignore
 /assets/src export-ignore
 /assets/test export-ignore
 /phpunit.xml.dist export-ignore
 /tests export-ignore
-/.git* export-ignore

.github/workflows/package-tests.yml

@@ -1,7 +1,8 @@
+/.gitattributes export-ignore
+/.gitignore export-ignore
 /.symfony.bundle.yaml export-ignore
 /assets/src export-ignore
 /assets/test export-ignore
 /assets/vitest.config.js export-ignore
 /phpunit.xml.dist export-ignore
 /tests export-ignore
-/.git* export-ignore

src/Autocomplete/.gitattributes

@@ -1,6 +1,7 @@
+/.gitattributes export-ignore
+/.gitignore export-ignore
 /.symfony.bundle.yaml export-ignore
 /assets/src export-ignore
 /assets/test export-ignore
 /phpunit.xml.dist export-ignore
 /tests export-ignore
-/.git* export-ignore