Silence warning about missing Android repo directory.

The warning has no context (i.e where the repo is referenced) and hence
only adds spam to the log.

Change-Id: I54588ac845ff35b235bea60e6bf1252a65db9c39

Author: Stewart Miles

source/PlayServicesResolver/src/LocalMavenRepository.cs

@@ -65,9 +65,6 @@ public static List<string> FindAars(string directory) {
                 foreach (string currentDirectory in Directory.GetDirectories(directory)) {
                     foundFiles.AddRange(FindAars(currentDirectory));
                 }
-            } else {
-                PlayServicesResolver.Log(String.Format("Repo directory {0} not found", directory),
-                                         LogLevel.Warning);
             }
             return foundFiles;
         }