code review 5372080: syscall: use error

src/pkg/syscall/syscall_plan9.go

Index: src/pkg/syscall/syscall_plan9.go
===================================================================
--- a/src/pkg/syscall/syscall_plan9.go
+++ b/src/pkg/syscall/syscall_plan9.go
@@ -17,11 +17,6 @@
 
 const ImplementsGetwd = true
 
-// An Error can represent any printable error condition.
-type Error interface {
-	error
-}
-
 // ErrorString implements Error's String method by returning itself.
 type ErrorString string