remove a piece of redundant comment (#10392)
remove a piece of redundant comment (#10392)

introduced in #10147 since we blocked the first-arg mechanism on subcommands
oranagra/redis,ofirluzon/redis,yossigo/redis,soloestoy/redis,charsyam/redis,PKRoma/redis,neomantra/redis,ofirluzon/redis,yossigo/redis,neomantra/redis,charsyam/redis,antirez/redis,oranagra/redis,soloestoy/redis,yossigo/redis,soloestoy/redis,oranagra/redis,charsyam/redis,antirez/redis,PKRoma/redis,ofirluzon/redis,ofirluzon/redis,oranagra/redis,neomantra/redis,charsyam/redis,neomantra/redis,PKRoma/redis,oranagra/redis,soloestoy/redis,charsyam/redis,antirez/redis,yossigo/redis,soloestoy/redis,antirez/redis,yossigo/redis,PKRoma/redis,PKRoma/redis,ofirluzon/redis,neomantra/redis