remotes: remove unused hints

Signed-off-by: Stephen J Day <stephen.day@docker.com>

remotes/hints.go

@@ -1,31 +0,0 @@
-package remotes
-
-import "strings"
-
-// HintExists returns true if a hint of the provided kind and values exists in
-// the set of provided hints.
-func HintExists(kind, value string, hints ...string) bool {
-	for _, hint := range hints {
-		if strings.HasPrefix(hint, kind) && strings.HasSuffix(hint, value) {
-			return true
-		}
-	}
-
-	return false
-}
-
-// HintValues returns a slice of the values of the hints that match kind.
-func HintValues(kind string, hints ...string) []string {
-	var values []string
-	for _, hint := range hints {
-		if strings.HasPrefix(hint, kind) {
-			parts := strings.SplitN(hint, ":", 2)
-			if len(parts) < 2 {
-				continue
-			}
-			values = append(values, parts[1])
-		}
-	}
-
-	return values
-}