Remove deprecated Location interface

Author: davecheney

errors.go

@@ -162,18 +162,11 @@ func Cause(err error) error {
 //            Stacktrace() []Frame
 //     }
 //
-//     type Location interface {
-//            Location() (file string, line int)
-//     }
-//
 // Print will also print the file and line of the error.
 // If err is nil, nothing is printed.
 //
 // Deprecated: Fprint will be removed in version 0.7.
 func Fprint(w io.Writer, err error) {
-	type location interface {
-		Location() (string, int)
-	}
 	type stacktrace interface {
 		Stacktrace() []Frame
 	}
@@ -185,10 +178,7 @@ func Fprint(w io.Writer, err error) {
 		switch err := err.(type) {
 		case stacktrace:
 			frame := err.Stacktrace()[0]
-			fmt.Fprintf(w, "%+s:%d: ", frame, frame)
-		case location:
-			file, line := err.Location()
-			fmt.Fprintf(w, "%s:%d: ", file, line)
+			fmt.Fprintf(w, "%+v: ", frame)
 		default:
 			// de nada
 		}

stack.go

@@ -82,12 +82,6 @@ type stack []uintptr
 // Deprecated: use Stacktrace()
 func (s *stack) Stack() []uintptr { return *s }
 
-// Deprecated: use Stacktrace()[0]
-func (s *stack) Location() (string, int) {
-	frame := s.Stacktrace()[0]
-	return fmt.Sprintf("%+s", frame), frame.line()
-}
-
 func (s *stack) Stacktrace() []Frame {
 	f := make([]Frame, len(*s))
 	for i := 0; i < len(f); i++ {

stack_test.go

@@ -41,20 +41,6 @@ func TestFrameLine(t *testing.T) {
 	}
 }
 
-func TestStackLocation(t *testing.T) {
-	st := func() *stack {
-		var pcs [32]uintptr
-		n := runtime.Callers(1, pcs[:])
-		var st stack = pcs[0:n]
-		return &st
-	}()
-	file, line := st.Location()
-	wfile, wline := "github.com/pkg/errors/stack_test.go", 47
-	if file != wfile || line != wline {
-		t.Errorf("stack.Location(): want %q %d, got %q %d", wfile, wline, file, line)
-	}
-}
-
 type X struct{}
 
 func (x X) val() Frame {