Remove incorrect project reference to WebSearch plugin

Author: jjw24

Wox/Wox.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
+<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
@@ -75,7 +75,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\Plugins\Wox.Plugin.WebSearch\Wox.Plugin.WebSearch.csproj" />
     <ProjectReference Include="..\Wox.Core\Wox.Core.csproj" />
     <ProjectReference Include="..\Wox.Infrastructure\Wox.Infrastructure.csproj" />
     <ProjectReference Include="..\Wox.Plugin\Wox.Plugin.csproj" />