Remove unused variables / code (#7736)

* remove unused variables / code

* fix bug in testPostStoreGetOldest

cmd/platform/output.go

@@ -11,22 +11,10 @@ func CommandPrintln(a ...interface{}) (int, error) {
 	return fmt.Println(a...)
 }
 
-func CommandPrint(a ...interface{}) (int, error) {
-	return fmt.Print(a...)
-}
-
 func CommandPrintErrorln(a ...interface{}) (int, error) {
 	return fmt.Fprintln(os.Stderr, a...)
 }
 
-func CommandPrintError(a ...interface{}) (int, error) {
-	return fmt.Fprint(os.Stderr, a...)
-}
-
 func CommandPrettyPrintln(a ...interface{}) (int, error) {
 	return fmt.Fprintln(os.Stderr, a...)
 }
-
-func CommandPrettyPrint(a ...interface{}) (int, error) {
-	return fmt.Fprint(os.Stderr, a...)
-}