[miio] update readme (#4330)
[miio] update readme (#4330)

Remove product pictures as discussed in #2548

Signed-off-by: Marcel Verpaalen <44592b4eea36663c86b994bb0ea99d15309c1c7d@verpaalen.com>
theoweiss/openhab2,theoweiss/openhab2,theoweiss/openhab2,afuechsel/openhab2,afuechsel/openhab2,digitaldan/openhab2,gerrieg/openhab2,theoweiss/openhab2,Snickermicker/openhab2,gerrieg/openhab2,clinique/openhab2,digitaldan/openhab2,digitaldan/openhab2,Snickermicker/openhab2,clinique/openhab2,clinique/openhab2,afuechsel/openhab2,clinique/openhab2,Snickermicker/openhab2,Snickermicker/openhab2,digitaldan/openhab2,gerrieg/openhab2,gerrieg/openhab2