Remove Azure authenticator because it is deprecated.

pom.xml

@@ -140,19 +140,6 @@
         <artifactId>bcpkix-jdk18on</artifactId>
         <version>${bouncycastle.version}</version>
       </dependency>
-      <dependency>
-        <groupId>com.microsoft.azure</groupId>
-        <artifactId>adal4j</artifactId>
-        <version>1.6.7</version>
-        <optional>true</optional>
-      </dependency>
-      <!-- override the version in adal4j which has a CVE -->
-      <dependency>
-        <groupId>net.minidev</groupId>
-        <artifactId>json-smart</artifactId>
-        <version>2.5.1</version>
-        <optional>true</optional>
-      </dependency>
       <dependency>
         <groupId>com.amazonaws</groupId>
         <artifactId>aws-java-sdk-sts</artifactId>

util/pom.xml

@@ -57,10 +57,6 @@
             <groupId>org.bouncycastle</groupId>
             <artifactId>bcpkix-jdk18on</artifactId>
         </dependency>
-        <dependency>
-            <groupId>com.microsoft.azure</groupId>
-            <artifactId>adal4j</artifactId>
-        </dependency>
         <dependency>
             <groupId>com.amazonaws</groupId>
             <artifactId>aws-java-sdk-sts</artifactId>

util/src/main/java/io/kubernetes/client/util/KubeConfig.java

@@ -18,7 +18,6 @@
 import com.google.gson.JsonParser;
 import io.kubernetes.client.persister.ConfigPersister;
 import io.kubernetes.client.util.authenticators.Authenticator;
-import io.kubernetes.client.util.authenticators.AzureActiveDirectoryAuthenticator;
 import io.kubernetes.client.util.authenticators.GCPAuthenticator;
 import io.kubernetes.client.util.authenticators.OpenIDConnectAuthenticator;
 import java.io.File;
@@ -79,7 +78,6 @@ public static void registerAuthenticator(Authenticator auth) {
 
   static {
     registerAuthenticator(new GCPAuthenticator());
-    registerAuthenticator(new AzureActiveDirectoryAuthenticator());
     registerAuthenticator(new OpenIDConnectAuthenticator());
   }