fix deps failure

Author: jainsahab

google-cloud-datastore/pom.xml

@@ -34,10 +34,6 @@
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core-grpc</artifactId>
     </dependency>
-    <dependency>
-      <groupId>com.google.auth</groupId>
-      <artifactId>google-auth-library-oauth2-http</artifactId>
-    </dependency>
     <dependency>
       <groupId>com.google.api.grpc</groupId>
       <artifactId>proto-google-cloud-datastore-v1</artifactId>
@@ -110,10 +106,6 @@
       <groupId>com.google.oauth-client</groupId>
       <artifactId>google-oauth-client</artifactId>
     </dependency>
-    <dependency>
-      <groupId>com.google.auth</groupId>
-      <artifactId>google-auth-library-oauth2-http</artifactId>
-    </dependency>
     <dependency>
       <groupId>io.opencensus</groupId>
       <artifactId>opencensus-api</artifactId>