Remove unused direct dependency of com.google.http-client (#905)

Author: shijiesheng

build.gradle

@@ -71,7 +71,6 @@ dependencies {
     compile group: 'com.google.api.grpc', name: 'proto-google-common-protos', version: '2.10.0'
     compile group: 'com.google.protobuf', name: 'protobuf-java-util', version: '3.21.9'
     compile group: 'com.google.oauth-client', name: 'google-oauth-client', version: '1.35.0'
-    compile group: 'com.google.http-client', name: 'google-http-client-gson', version: '1.19.0'
 
     implementation 'io.grpc:grpc-netty-shaded:1.54.2'
     implementation 'io.grpc:grpc-protobuf:1.54.2'