remove unused import

src/main/java/org/opengroup/osdu/azure/entitlements/service/EntitlementsAzure.java

@@ -14,7 +14,6 @@
 
 package org.opengroup.osdu.azure.entitlements.service;
 
-import com.ctc.wstx.util.StringUtil;
 import com.microsoft.azure.spring.autoconfigure.aad.UserPrincipal;
 import lombok.AllArgsConstructor;
 import lombok.Data;