utils: mtd-utils: drop patches

utils: mtd-utils: drop patches

We have been carrying the 100-fix_includes.patch and 130-lzma_jffs2.patch
for a long time but the reason is lost to history.

We dont need to carry the JFFS2 LZMA support patch as mkfs.jffs2 is not
even being packaged so its not even being used.

As for the 100-fix_includes.patch that also seems like a relic of history
as mtd-utils compiles fine without it.

So, lets drop both patches.

Link: https://github.com/openwrt/openwrt/pull/15790
Signed-off-by: Robert Marko <robimarko@gmail.com>