8255262: Remove use of legacy custom @spec tag

Reviewed-by: lancea, mr, iris, alanb, darcy, mchung

src/java.base/share/classes/java/security/SecureClassLoader.java

@@ -108,7 +108,6 @@ public class SecureClassLoader extends ClassLoader {
      *         doesn't allow creation of a class loader.
      *
      * @since 9
-     * @spec JPMS
      */
     protected SecureClassLoader(String name, ClassLoader parent) {
         super(name, parent);