[TASK] Drop unneeded file .cache/.npmrc

`unsafe-perm = true` is not available in npm v8 documentation,
and TYPO3 core requires npm =>v8.
The file has been introduced with #96355 during yarn to npm
migration, it has been added during early patchsets that
targeted npm v6. Now that we use npm v8 it is no longer
needed.

Releases: main
Resolves: #98270
Related: #96355
Change-Id: Ide7eea24f6b78da2f83a8d6303021e734bdcb47b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75625


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>

.cache/.npmrc

-# Required for Docker builds on CI (Gitlab)
-# https://github.com/ds300/patch-package/issues/185
-unsafe-perm = true

.gitignore

@@ -25,8 +25,7 @@ nbproject
 .webprj
 #
 # Temporary files and folders
-/.cache/*
-!/.cache/.npmrc
+/.cache
 .php_cs.cache
 .php-cs-fixer.cache
 .sass-cache