private void remove0(AbstractHandlerContext ctx) {
        AbstractHandlerContext prev = ctx.prev;
        AbstractHandlerContext next = ctx.next;
        prev.next = next;
        next.prev = prev;
        callHandlerRemoved(ctx);
    }
Most of the code references the pipeline design of
<a href="https://github.com/netty/netty">Netty</a>.

@author jiachun.fjc
jraft-rheakv/rheakv-core/src/main/java/com/alipay/sofa/jraft/rhea/util/pipeline/DefaultPipeline.java