Removed JDK 1.8 function reference

src/main/java/password/pwm/config/profile/PwmPasswordPolicy.java

@@ -32,7 +32,6 @@ import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
-import java.util.function.Function;
 import java.util.regex.Pattern;
 import java.util.regex.PatternSyntaxException;