fix warning

Author: breedx-splk

sdk-extensions/incubator/src/main/java/io/opentelemetry/sdk/extension/incubator/fileconfig/DeclarativeConfiguration.java

@@ -246,7 +246,7 @@ private static final class EnvLoad extends Load {
     private final LoadSettings settings;
     private final Map<String, String> environmentVariables;
 
-    public EnvLoad(LoadSettings settings, Map<String, String> environmentVariables) {
+    private EnvLoad(LoadSettings settings, Map<String, String> environmentVariables) {
       super(settings);
       this.settings = settings;
       this.environmentVariables = environmentVariables;