Remove P/Invoke from WP-SL binding.

Author: yfakariya

src/MsgPack.Silverlight.WindowsPhone/MsgPack.Silverlight.WindowsPhone.csproj

@@ -682,8 +682,6 @@
     <Compile Include="..\MsgPack\UnpackingStreamReader.cs">
       <Link>UnpackingStreamReader.cs</Link>
     </Compile>
-    <Compile Include="..\MsgPack\UnsafeNativeMethods.cs">
-      <Link>UnsafeNativeMethods.cs</Link>
     </Compile>
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>

src/MsgPack/MessagePackString.cs

@@ -257,7 +257,7 @@ private static bool EqualsEncoded( MessagePackString left, MessagePackString rig
 				return false;
 			}
 
-#if !UNITY
+#if !UNITY && !WINDOWS_PHONE
 			if ( _isFastEqualsDisabled == 0 )
 			{
 				try
@@ -273,7 +273,7 @@ private static bool EqualsEncoded( MessagePackString left, MessagePackString rig
 					Interlocked.Exchange( ref _isFastEqualsDisabled, 1 );
 				}
 			}
-#endif // if !UNITY
+#endif // if !UNITY && !WINDOWS_PHONE
 
 			return SlowEquals( left._encoded, right._encoded );
 		}
@@ -291,13 +291,13 @@ private static bool SlowEquals( byte[] x, byte[] y )
 			return true;
 		}
 
-#if !UNITY
-#if SILVERLIGHT && !WINDOWS_PHONE
+#if !UNITY && !WINDOWS_PHONE
+#if SILVERLIGHT
 		private static int _isFastEqualsDisabled =
 			System.Windows.Application.Current.HasElevatedPermissions ? 0 : 1;
 #else
 		private static int _isFastEqualsDisabled;
-#endif // if SILVERLIGHT && !WINDOWS_PHONE
+#endif // if SILVERLIGHT
 
 #if DEBUG
 		// for testing
@@ -327,7 +327,7 @@ private static bool UnsafeFastEquals( byte[] x, byte[] y )
 
 			return result == 0;
 		}
-#endif // if !UNITY
+#endif // if !UNITY && !WINDOWS_PHONE
 
 #if !SILVERLIGHT && !NETFX_CORE
 		[Serializable]