tabwriter: delete unnecessary type declaration
tabwriter: delete unnecessary type declaration

R=rsc, r2
CC=golang-dev
http://codereview.appspot.com/2733041

d0f/go-zh,glycerine/jeaten-go-arrayof-structof,bryanxu/go-zh,sanjosh/sanjos100-tipc,bryanxu/go-zh,rdp/rogerpack2005-golang,mhennings/marcohennings-go,npe9/noahevans-go9,npe9/noahevans-go9,npe9/noahevans-go9,glycerine/jeaten-go-arrayof-structof,mhennings/marcohennings-go,Triskite/willstone-goclone,sanjosh/sanjos100-tipc,npe9/noahevans-go9,scirelli/scirelli-go,rdp/rogerpack2005-golang,webfd/go-zh,glycerine/jeaten-go-arrayof-structof,glycerine/jeaten-go-arrayof-structof,mhennings/marcohennings-go,scirelli/scirelli-go,glycerine/jeaten-go-arrayof-structof,rflanagan/reginaldflanagan-project1,rdp/rogerpack2005-golang,rflanagan/reginaldflanagan-project1,scirelli/scirelli-go,mhennings/marcohennings-go,scirelli/scirelli-go,d0f/go-zh,webfd/go-zh,glycerine/jeaten-go-arrayof-structof,d0f/go-zh,Triskite/willstone-goclone,webfd/go-zh,d0f/go-zh,scirelli/scirelli-go,bryanxu/go-zh,webfd/go-zh,rdp/rogerpack2005-golang,d0f/go-zh,npe9/noahevans-go9,Triskite/willstone-goclone,scirelli/scirelli-go,scirelli/scirelli-go,bryanxu/go-zh,npe9/noahevans-go9,sanjosh/sanjos100-tipc,sanjosh/sanjos100-tipc,npe9/noahevans-go9,d0f/go-zh,sanjosh/sanjos100-tipc,bryanxu/go-zh,webfd/go-zh,glycerine/jeaten-go-arrayof-structof,rflanagan/reginaldflanagan-project1,rdp/rogerpack2005-golang,Triskite/willstone-goclone,mhennings/marcohennings-go,glycerine/jeaten-go-arrayof-structof,webfd/go-zh,npe9/noahevans-go9,sanjosh/sanjos100-tipc,bryanxu/go-zh,rflanagan/reginaldflanagan-project1,mhennings/marcohennings-go,scirelli/scirelli-go,Triskite/willstone-goclone,sanjosh/sanjos100-tipc,d0f/go-zh,bryanxu/go-zh,webfd/go-zh,rflanagan/reginaldflanagan-project1,rflanagan/reginaldflanagan-project1,d0f/go-zh,rflanagan/reginaldflanagan-project1,rdp/rogerpack2005-golang,mhennings/marcohennings-go,webfd/go-zh,sanjosh/sanjos100-tipc,bryanxu/go-zh,Triskite/willstone-goclone,rdp/rogerpack2005-golang,Triskite/willstone-goclone,rflanagan/reginaldflanagan-project1,Triskite/willstone-goclone,mhennings/marcohennings-go,rdp/rogerpack2005-golang