pkg/system: remove solaris left-over

It was removed everywhere else, so we may as well remove it here.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

pkg/system/stat_solaris.go

@@ -1,13 +0,0 @@
-package system // import "github.com/docker/docker/pkg/system"
-
-import "syscall"
-
-// fromStatT converts a syscall.Stat_t type to a system.Stat_t type
-func fromStatT(s *syscall.Stat_t) (*StatT, error) {
-	return &StatT{size: s.Size,
-		mode: s.Mode,
-		uid:  s.Uid,
-		gid:  s.Gid,
-		rdev: s.Rdev,
-		mtim: s.Mtim}, nil
-}