[TASK] Remove unnecessary typecast in ext:belog

The type of the function argument `$number` is already defined
as int, so the following typecast can safely be removed.

Resolves: #101413
Releases: main
Signed-off-by: Torben Hansen <derhansen@gmail.com>
Change-Id: I9f6296ae7bc7f0f0462ca330b4a2fa6b63bd3c48
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/80114


Reviewed-by: Sybille Peters <sypets@gmx.de>
Reviewed-by: Stefan B�rk <stefan@buerk.tech>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Stefan B�rk <stefan@buerk.tech>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Sybille Peters <sypets@gmx.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: core-ci <typo3@b13.com>