following shipunyc feedback: remove unused imports, and use httpClient

field instead

Author: boly38

src/com/microsoft/azure/documentdb/GatewayProxy.java

@@ -21,9 +21,6 @@
 
 import org.apache.http.Header;
 import org.apache.http.HttpEntity;
-import org.apache.http.HttpException;
-import org.apache.http.HttpHost;
-import org.apache.http.HttpRequest;
 import org.apache.http.HttpResponse;
 import org.apache.http.ParseException;
 import org.apache.http.client.HttpClient;
@@ -32,16 +29,12 @@
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.client.methods.HttpPut;
 import org.apache.http.client.methods.HttpRequestBase;
-import org.apache.http.conn.routing.HttpRoute;
-import org.apache.http.conn.routing.HttpRoutePlanner;
-import org.apache.http.conn.scheme.SchemeRegistry;
 import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.impl.conn.PoolingClientConnectionManager;
 import org.apache.http.impl.conn.ProxySelectorRoutePlanner;
 import org.apache.http.impl.conn.SchemeRegistryFactory;
 import org.apache.http.params.HttpConnectionParams;
 import org.apache.http.params.HttpParams;
-import org.apache.http.protocol.HttpContext;
 import org.apache.http.util.EntityUtils;