[mesh] minor cleanup of MeshRouterRTL
[mesh] minor cleanup of MeshRouterRTL

12yujim/pymtl,jck/pymtl,Glyfina-Fernando/pymtl,cfelton/pymtl,tj93/pymtl,cfelton/pymtl,tj93/pymtl,tj93/pymtl,Glyfina-Fernando/pymtl,jck/pymtl,Glyfina-Fernando/pymtl,jjffryan/pymtl,12yujim/pymtl,cornell-brg/pymtl,cornell-brg/pymtl,12yujim/pymtl,cornell-brg/pymtl,jjffryan/pymtl,jjffryan/pymtl,jck/pymtl,cfelton/pymtl