Remove some useless files.

rest/dav/prop.go

@@ -272,70 +272,6 @@ func allprop(ctx context.Context, fs FileSystem, ls LockSystem, name string, inc
 	return props(ctx, fs, ls, name, pnames)
 }
 
-// Patch patches the properties of resource name. The return values are
-// constrained in the same manner as DeadPropsHolder.Patch.
-func patch(ctx context.Context, fs FileSystem, ls LockSystem, name string, patches []Proppatch) ([]Propstat, error) {
-	conflict := false
-loop:
-	for _, patch := range patches {
-		for _, p := range patch.Props {
-			if _, ok := liveProps[p.XMLName]; ok {
-				conflict = true
-				break loop
-			}
-		}
-	}
-	if conflict {
-		pstatForbidden := Propstat{
-			Status:   http.StatusForbidden,
-			XMLError: `<D:cannot-modify-protected-property xmlns:D="DAV:"/>`,
-		}
-		pstatFailedDep := Propstat{
-			Status: StatusFailedDependency,
-		}
-		for _, patch := range patches {
-			for _, p := range patch.Props {
-				if _, ok := liveProps[p.XMLName]; ok {
-					pstatForbidden.Props = append(pstatForbidden.Props, Property{XMLName: p.XMLName})
-				} else {
-					pstatFailedDep.Props = append(pstatFailedDep.Props, Property{XMLName: p.XMLName})
-				}
-			}
-		}
-		return makePropstats(pstatForbidden, pstatFailedDep), nil
-	}
-
-	f, err := fs.OpenFile(ctx, name, os.O_RDWR, 0)
-	if err != nil {
-		return nil, err
-	}
-	defer f.Close()
-	if dph, ok := f.(DeadPropsHolder); ok {
-		ret, err := dph.Patch(patches)
-		if err != nil {
-			return nil, err
-		}
-		// http://www.webdav.org/specs/rfc4918.html#ELEMENT_propstat says that
-		// "The contents of the prop XML element must only list the names of
-		// properties to which the result in the status element applies."
-		for _, pstat := range ret {
-			for i, p := range pstat.Props {
-				pstat.Props[i] = Property{XMLName: p.XMLName}
-			}
-		}
-		return ret, nil
-	}
-	// The file doesn't implement the optional DeadPropsHolder interface, so
-	// all patches are forbidden.
-	pstat := Propstat{Status: http.StatusForbidden}
-	for _, patch := range patches {
-		for _, p := range patch.Props {
-			pstat.Props = append(pstat.Props, Property{XMLName: p.XMLName})
-		}
-	}
-	return []Propstat{pstat}, nil
-}
-
 func EscapeXML(s string) string {
 	for i := 0; i < len(s); i++ {
 		// As an optimization, if s contains only ASCII letters, digits or a