vim-tiny: remove alternative for xxd

xxd is not available in vim-tiny, so remove from the default ALTERNATIVE
list to fix the following warning:

vim-tiny: alternative target (/usr/bin/xxd or /usr/bin/xxd.vim-tiny)
does not exist, skipping

Signed-off-by: Ricardo Salveti <ricardo@foundries.io>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/vim/vim-tiny_8.1.0347.bb

@@ -3,6 +3,7 @@ require vim_${PV}.bb
 SUMMARY += " (with tiny features)"
 
 PROVIDES_remove = "xxd"
+ALTERNATIVE_${PN}_remove = "xxd"
 
 PACKAGECONFIG += "tiny"