bootmenu/bootmenu_0.7.bb: removed unneeded EXTRA_OEMAKE
bootmenu/bootmenu_0.7.bb: removed unneeded EXTRA_OEMAKE

verified by comparing bitbake -e output from before and after the edit

Signed-off-by: Frans Meulenbroeks <6def945a6cdf470073fde46d27fb7849dda40aca@gmail.com>

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