updpkg: 1.8.5-4: remove unnecessary patching
Originally there was no knob to disable version checking during startup, thus it was manually patched out. Since v1.7.2 there is a proper CMake option 'ENABLE_CHECK_VERSION' to disable this feature [1], thus it would be more readable to just use it.
[1] https://github.com/raspberrypi/rpi-imager/commit/5d971375f6594e1e19ef0b071e487967c12a527e