Remove deprecated methods from c.t.f.http.Response

Remove the deprecated `setStatusCode` and `getStatusCode` methods
from `c.t.f.http.Response`.

JIRA Issues: CSL-7774

Differential Revision: https://phabricator.twitter.biz/D326326

CHANGELOG.rst

@@ -10,6 +10,9 @@ Unreleased
 Breaking API Changes
 ~~~~~~~~~~~~~~~~~~~~
 
+* finagle-base-http: Removed the methods `setStatusCode` and `getStatusCode` from
+  `c.t.f.http.Response` which have been deprecated since 2017. ``PHAB_ID=D326326``
+
 * finagle-core: A long deprecated `c.t.f.builder.ServerBuilder#build` method, which
   takes a `Service[Req, Rep]` and a not fully specified config as params, has been
   removed. ``PHAB_ID=D330348``

finagle-base-http/src/main/scala/com/twitter/finagle/http/Response.scala

@@ -61,14 +61,6 @@ abstract class Response private extends Message {
     this
   }
 
-  /** Get the status code of this response */
-  @deprecated("2017-02-17", "Use [[statusCode]] instead")
-  final def getStatusCode(): Int = statusCode
-
-  /** Set the status code of this response */
-  @deprecated("2017-02-17", "Use [[statusCode(Int)]] instead")
-  final def setStatusCode(value: Int): Unit = { statusCode = value }
-
   override def toString =
     "Response(\"" + version + " " + status + "\")"
 }