Remove a text block with AWK

BEGIN {
    STARTBLOCK="{"
    CONDITION="REMOVEME"
    ENDBLOCK="}"
}
{
    if ($0 ~ STARTBLOCK) {
        block[nf=1] = $0
        flag=1
    } else if (flag==1) {
        if ($0 ~ ENDBLOCK) {
            if (notprint==0) {
                for (x=1;x<=nf;x++) {
                print block[x]
                }
                print $0
            } else { notprint=0 }
            flag=0
        } else {
            if  ($0 ~ CONDITION) {
                notprint=1
            } else {
                block[++nf] = $0
            }
        }
    } else {
        print $0
    }  
}