Rollup merge of #140597 - SchmErik:rm-schmerik, r=Urgau

zkvm: remove schmerik as target maintainer

I am no longer actively working on this target so I would like to be dropped from this list.

Author: matthiaskrgr

src/doc/rustc/src/platform-support/riscv32im-risc0-zkvm-elf.md

@@ -8,7 +8,6 @@ RISC Zero's Zero Knowledge Virtual Machine (zkVM) implementing the RV32IM instru
 
 [@flaub](https://github.com/flaub)
 [@jbruestle](https://github.com/jbruestle)
-[@SchmErik](https://github.com/SchmErik)
 
 ## Background