Remove EnvironmentInfo

This moved the last bit of usefulness of EnvironmentInfo into a static
class.

MediaBrowser.Model/System/IEnvironmentInfo.cs

@@ -1,21 +0,0 @@
-using System.Runtime.InteropServices;
-
-namespace MediaBrowser.Model.System
-{
-    public interface IEnvironmentInfo
-    {
-        OperatingSystem OperatingSystem { get; }
-        string OperatingSystemName { get; }
-        string OperatingSystemVersion { get; }
-        Architecture SystemArchitecture { get; }
-    }
-
-    public enum OperatingSystem
-    {
-        Windows,
-        Linux,
-        OSX,
-        BSD,
-        Android
-    }
-}

MediaBrowser.Model/System/OperatingSystemId.cs

@@ -0,0 +1,10 @@
+namespace MediaBrowser.Model.System
+{
+    public enum OperatingSystemId
+    {
+        Windows,
+        Linux,
+        Darwin,
+        BSD
+    }
+}