[BUGFIX] Unlink temp files in import of ext:impexp

The check that the file is in one of the temporary folders has been
removed, as this check is already done in the unlink method of the
GeneralUtility.

This patch specifically addresses composer based installations.

Resolves: #94500
Releases: master, 10.4, 9.5
Change-Id: I0a38f5ef3da3494ca38310033f63cc591931fb63
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69754


Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benni Mack <benni@typo3.org>