Remove Imports of Locale from all validatorUtils.mustache-files

Signed-off-by: Chrimle <28791817+Chrimle@users.noreply.github.com>

Author: Chrimle

modules/openapi-generator/src/main/resources/java-helidon/server/libraries/se/validatorUtils.mustache

@@ -7,7 +7,6 @@ import java.util.Collection;
 import java.util.List;
 {{/x-helidon-v3}}
 import java.util.Map;
-import java.util.Locale;
 import java.util.Objects;
 {{^x-helidon-v3}}
 import java.util.Optional;