Remove AWS SDK v1 STS dependency from multilang-schema-registry module

The v2 equivalent software.amazon.awssdk:sts is already declared
and no v1 STS classes are used in source code.

Author: jvdadda

multilang-schema-registry/pom.xml

@@ -66,12 +66,6 @@
             <artifactId>url-connection-client</artifactId>
         </dependency>
 
-        <dependency>
-            <groupId>com.amazonaws</groupId>
-            <artifactId>aws-java-sdk-sts</artifactId>
-             <version>${aws.sdk.v1.version}</version>
-        </dependency>
-
         <dependency>
             <groupId>software.amazon.awssdk</groupId>
             <artifactId>sts</artifactId>