Remove windows specified Platform Toolset (#113)

Author: TatianaKapos

windows/progress-view/progress-view.vcxproj

@@ -54,9 +54,6 @@
   </ItemGroup>
   <PropertyGroup Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
-    <PlatformToolset>v140</PlatformToolset>
-    <PlatformToolset Condition="'$(VisualStudioVersion)' == '15.0'">v141</PlatformToolset>
-    <PlatformToolset Condition="'$(VisualStudioVersion)' == '16.0'">v142</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
     <GenerateManifest>false</GenerateManifest>
   </PropertyGroup>