Definitively removed the `UMATokensProvider` class since is no more useful to anyone

src/main/java/org/gcube/portal/oidc/lr62/OIDCUmaUtil.java

@@ -391,10 +391,8 @@ public class OIDCUmaUtil {
 
     }
 
-    @SuppressWarnings("deprecation")
     public static void provideTokensInThreadlocal(JWTToken umaTokens) {
-        log.debug("Setting UMA token with jti {} in UMA providers", umaTokens.getJti());
-        UMATokensProvider.instance.set(JWTTokenUtil.getRawContent(umaTokens));
+        log.debug("Setting UMA token with jti {} in AccessToken provider", umaTokens.getJti());
         AccessTokenProvider.instance.set(JWTTokenUtil.getAccessTokenString(umaTokens));
     }
 

src/main/java/org/gcube/portal/oidc/lr62/UMATokensProvider.java

@@ -1,30 +0,0 @@
-package org.gcube.portal.oidc.lr62;
-
-public class UMATokensProvider {
-
-    public static UMATokensProvider instance = new UMATokensProvider();
-
-    private static final InheritableThreadLocal<String> threadToken = new InheritableThreadLocal<String>() {
-
-        @Override
-        protected String initialValue() {
-            return null;
-        }
-
-    };
-
-    private UMATokensProvider() {
-    }
-
-    public String get() {
-        return threadToken.get();
-    }
-
-    public void set(String jwt) {
-        threadToken.set(jwt);
-    }
-
-    public void reset() {
-        threadToken.remove();
-    }
-}