>>24214 (you)
>CHAIRMAN of the Senate Judiciary Committee
>who replaces him, if removed?

Rule XXIV

4. When a chairman of a committee shall resign or cease to serve on a committee, action by the Senate to fill the vacancy in such committee, unless specially otherwise ordered, shall be only to fill up the number of members of the committee, and the election of a new chairman.

https://www.govinfo.gov/content/pkg/CDOC-113sdoc18/pdf/CDOC-113sdoc18.pdf#page=24