stray files in /boot

I noticed recently when I umounted my mmcblk0p1 from /boot I had some stray files still in there. Trying to figure out how important they are before removing.

Code:-rw-r--r-- 1 root root 1832 Aug 8 2019 README-kernels.txt
lrwxrwxrwx 1 root root 40 Oct 3 2019 README.initrd -> ../usr/doc/mkinitrd-1.4.11/README.initrd
lrwxrwxrwx 1 root root 24 Oct 3 2019 System.map-armv7 -> System.map-armv7-4.19.73-rw-r--r-- 1 root root 3241718 Sep 16 2019 System.map-armv7-4.19.73
-rw-r--r-- 1 root root 221164 Sep 16 2019 config-armv7-4.19.73
lrwxrwxrwx 1 root root 11 Oct 3 2019 dtb -> dtb-4.19.73
drwxr-xr-x 2 root root 36864 Sep 16 2019 dtb-4.19.73
lrwxrwxrwx 1 root root 20 Oct 3 2019 initrd-armv7 -> initrd-armv7-4.19.73
-rw-r--r-- 1 root root 11670338 Sep 16 2019 initrd-armv7-4.19.73
lrwxrwxrwx 1 root root 20 Oct 3 2019 uImage-armv7 -> uImage-armv7-4.19.73
-rw-r--r-- 1 root root 5506712 Sep 16 2019 uImage-armv7-4.19.73
lrwxrwxrwx 1 root root 21 Oct 3 2019 uinitrd-armv7 -> uinitrd-armv7-4.19.73
-rw-r--r-- 1 root root 11670402 Sep 16 2019 uinitrd-armv7-4.19.73
lrwxrwxrwx 1 root root 20 Oct 3 2019 zImage-armv7 -> zImage-armv7-4.19.73
-rw-r--r-- 1 root root 5506648 Sep 16 2019 zImage-armv7-4.19.73