d4d_icon: remove redundant declaration
d4d_icon: remove redundant declaration

D4D_IconGetBmpCount is already declared in d4d_icon.h

Signed-off-by: Spencer Oliver <274c825bb9481ab7aaedce8943ce1794c78666c0@spen-soft.co.uk>

glibersat/firmware,BrewPi/firmware,BrewPi/firmware,glibersat/firmware,BrewPi/firmware,glibersat/firmware,glibersat/firmware,etk29321/firmware,etk29321/firmware,BrewPi/firmware,glibersat/firmware,BrewPi/firmware,etk29321/firmware,glibersat/firmware,BrewPi/firmware,BrewPi/firmware,glibersat/firmware,etk29321/firmware,etk29321/firmware,BrewPi/firmware,etk29321/firmware