tools: e2fsprogs: use standard make uninstall
There is no need to manually only remove 2 binaries during cleanup and
leave rest of the e2fsprogs installed stuff untouched, so instead use
make uninstall to do the cleanup.
Link: https://github.com/openwrt/openwrt/pull/15806
Signed-off-by: Robert Marko <[email protected]>