Remove redundant session token field from form (was already being added by base class).
Remove redundant session token field from form (was already being added by base class).

brion/StatusNet,zcopley/StatusNet,zh/statusnet,chimo/social,charnimda/lgbtpzn-social,foocorp/gnu-social,gnusocial/mainline,zcopley/zcopleys-statusnet-clone,znarf/statusnet-ladistribution,zcopley/zcopleys-statusnet-clone,chimo/social,csarven/statusnet,furtherfield/gnu-social,d3vgru/StatusNet,charlycoste/StatusNet,bankonme/gnu-social,UngPirat/freesocial,chimo/social,xebia/statusnet-oauth2,UngPirat/freesocial,bankonme/gnu-social,studio666/gnu-social,d3vgru/StatusNet,d3vgru/StatusNet,eXcomm/gnu-social,brion/StatusNet,furtherfield/gnu-social,xebia/statusnet-oauth2,shashi/StatusNet,zh/statusnet,charnimda/lgbtpzn-social,zcopley/StatusNet,csarven/statusnet,faulteh/gnu-social,furtherfield/gnu-social,sikevux/bsk-social,faulteh/gnu-social,zcopley/zcopleys-statusnet-clone,faulteh/gnu-social,Piratas/tortuga,foocorp/gnu-social,charnimda/lgbtpzn-social,znarf/statusnet-ladistribution,zh/statusnet,Piratas/tortuga,studio666/gnu-social,charlycoste/StatusNet,csarven/statusnet,UngPirat/freesocial,sikevux/bsk-social,Piratas/tortuga,Piratas/tortuga,gnusocial/mainline,eXcomm/gnu-social,minmb/statusnet,minmb/statusnet,shashi/StatusNet,bankonme/gnu-social,gnusocial/mainline,zcopley/StatusNet,gnusocial/mainline,bankonme/gnu-social,xebia/statusnet-oauth2,charlycoste/StatusNet,studio666/gnu-social,sikevux/bsk-social,eXcomm/gnu-social,znarf/statusnet-ladistribution,furtherfield/gnu-social,sikevux/bsk-social,studio666/gnu-social,eXcomm/gnu-social,csarven/statusnet,foocorp/gnu-social,faulteh/gnu-social,minmb/statusnet,brion/StatusNet,shashi/StatusNet