Deprecate Conduit method "diffusion.getrecentcommitsbypath"

Summary:
See D19558. This method has no callers and just wraps `diffusion.historyquery`, since D5960 (2013).

This was introduced in D315 (which didn't make it out of FB, I think) inside Facebook for unclear purposes in 2011.

Test Plan: Grepped for callers, found none.

Reviewers: amckinley

Reviewed By: amckinley

Subscribers: artms

Differential Revision: https://secure.phabricator.com/D19559

src/applications/diffusion/conduit/DiffusionGetRecentCommitsByPathConduitAPIMethod.php

@@ -9,6 +9,14 @@ final class DiffusionGetRecentCommitsByPathConduitAPIMethod
     return 'diffusion.getrecentcommitsbypath';
   }
 
+  public function getMethodStatus() {
+    return self::METHOD_STATUS_DEPRECATED;
+  }
+
+  public function getMethodStatusDescription() {
+    return pht('Obsoleted by "diffusion.historyquery".');
+  }
+
   public function getMethodDescription() {
     return pht(
       'Get commit identifiers for recent commits affecting a given path.');