Remove robust-http-client (#10190)

Author: krisstern

bom/pom.xml

@@ -287,11 +287,6 @@ THE SOFTWARE.
         <artifactId>localizer</artifactId>
         <version>1.31</version>
       </dependency>
-      <dependency>
-        <groupId>org.jvnet.robust-http-client</groupId>
-        <artifactId>robust-http-client</artifactId>
-        <version>1.2</version>
-      </dependency>
       <dependency>
         <groupId>org.jvnet.winp</groupId>
         <artifactId>winp</artifactId>

core/pom.xml

@@ -325,10 +325,6 @@ THE SOFTWARE.
       <groupId>org.jvnet.localizer</groupId>
       <artifactId>localizer</artifactId>
     </dependency>
-    <dependency>
-      <groupId>org.jvnet.robust-http-client</groupId>
-      <artifactId>robust-http-client</artifactId>
-    </dependency>
     <dependency>
       <groupId>org.jvnet.winp</groupId>
       <artifactId>winp</artifactId>

core/src/main/java/hudson/ProxyConfiguration.java

@@ -70,7 +70,6 @@
 import jenkins.util.JenkinsJVM;
 import jenkins.util.SystemProperties;
 import org.jenkinsci.Symbol;
-import org.jvnet.robust_http_client.RetryableHttpStream;
 import org.kohsuke.accmod.Restricted;
 import org.kohsuke.accmod.restrictions.NoExternalUse;
 import org.kohsuke.stapler.DataBoundConstructor;
@@ -346,10 +345,10 @@ public static URLConnection open(URL url) throws IOException {
     public static InputStream getInputStream(URL url) throws IOException {
         final ProxyConfiguration p = get();
         if (p == null)
-            return new RetryableHttpStream(url);
+            return ((HttpURLConnection) url.openConnection()).getInputStream();
 
         Proxy proxy = p.createProxy(url.getHost());
-        InputStream is = new RetryableHttpStream(url, proxy);
+        InputStream is = ((HttpURLConnection) url.openConnection(proxy)).getInputStream();
         if (p.getUserName() != null) {
             // Add an authenticator which provides the credentials for proxy authentication
             Authenticator.setDefault(p.authenticator);