Remove unused Jdk8Module import

Author: ppartarr

sdk/spring/azure-spring-boot/src/main/java/com/microsoft/azure/spring/autoconfigure/aad/AzureADGraphClient.java

@@ -4,7 +4,6 @@
 package com.microsoft.azure.spring.autoconfigure.aad;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
 import com.microsoft.aad.msal4j.ClientCredentialFactory;
 import com.microsoft.aad.msal4j.ConfidentialClientApplication;
 import com.microsoft.aad.msal4j.IAuthenticationResult;