4.x: Remove workaround for Parsson unicode detection issue (helidon-io#8260) (helidon-io#9472)

Author: Captain1653

security/jwt/src/main/java/io/helidon/security/jwt/jwk/JwkKeys.java

@@ -19,9 +19,6 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.lang.System.Logger.Level;
-import java.nio.charset.Charset;
-import java.nio.charset.StandardCharsets;
-import java.nio.charset.UnsupportedCharsetException;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.LinkedList;
@@ -30,7 +27,6 @@
 import java.util.Objects;
 import java.util.Optional;
 
-import io.helidon.common.NativeImageHelper;
 import io.helidon.common.configurable.Resource;
 
 import jakarta.json.Json;
@@ -59,26 +55,6 @@ public final class JwkKeys {
     private final Map<String, Jwk> keyMap = new HashMap<>();
     private final List<Jwk> noKeyIdKeys = new LinkedList<>();
 
-    private static final boolean AUTOMATIC_CHARSET_DETECTION;
-
-    // Workaround for https://github.com/eclipse-ee4j/parsson/issues/121
-    static {
-        boolean utf32Available = false;
-        try {
-            Charset.forName("UTF-32LE");
-            Charset.forName("UTF-32BE");
-            utf32Available = true;
-        } catch (UnsupportedCharsetException e) {
-            if (NativeImageHelper.isNativeImage()) {
-                LOGGER.log(Level.TRACE, "Automatic JSON unicode detection not available."
-                        + " Add -H:+AddAllCharsets to build your native image with UTF-32 support.", e);
-            } else {
-                LOGGER.log(Level.TRACE, "Automatic JSON unicode detection not available.", e);
-            }
-        }
-        AUTOMATIC_CHARSET_DETECTION = utf32Available;
-    }
-
     private JwkKeys(Builder builder) {
         this.keyMap.putAll(builder.keyMap);
         this.noKeyIdKeys.addAll(builder.noKeyIdKeys);
@@ -171,9 +147,7 @@ public Builder addKey(Jwk key) {
         public Builder resource(Resource resource) {
             Objects.requireNonNull(resource, "Json resource must not be null");
             try (InputStream is = resource.stream()) {
-                JsonObject jsonObject = AUTOMATIC_CHARSET_DETECTION
-                        ? JSON.createReader(is).readObject()
-                        : JSON.createReader(is, StandardCharsets.UTF_8).readObject();
+                JsonObject jsonObject = JSON.createReader(is).readObject();
                 addKeys(jsonObject);
             } catch (IOException e) {
                 LOGGER.log(Level.WARNING, "Failed to close input stream on resource: " + resource);