Remove useless ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch switches

The reason for these have been lost to the sands of time. Let's delete
them.

src/EditorFeatures/Core/EditorFeatures.csproj

@@ -14,8 +14,6 @@
     <OutputType>Library</OutputType>
     <RootNamespace>Microsoft.CodeAnalysis.Editor</RootNamespace>
     <AssemblyName>Microsoft.CodeAnalysis.EditorFeatures</AssemblyName>
-    <!-- Disable the architecture mismatch warning -->
-    <ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>None</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
     <TargetFrameworkVersion>v4.6</TargetFrameworkVersion>
     <CopyNuGetImplementations>false</CopyNuGetImplementations>
   </PropertyGroup>
@@ -820,4 +818,4 @@
   <ImportGroup Label="Targets">
     <Import Project="..\..\..\build\Targets\VSL.Imports.targets" />
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>

src/EditorFeatures/Text/TextEditorFeatures.csproj

@@ -10,8 +10,6 @@
     <OutputType>Library</OutputType>
     <RootNamespace>Microsoft.CodeAnalysis.Text</RootNamespace>
     <AssemblyName>Microsoft.CodeAnalysis.EditorFeatures.Text</AssemblyName>
-    <!-- Disable the architecture mismatch warning -->
-    <ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>None</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
     <TargetFrameworkVersion>v4.6</TargetFrameworkVersion>
     <CopyNuGetImplementations>false</CopyNuGetImplementations>
   </PropertyGroup>

src/Interactive/EditorFeatures/Core/InteractiveEditorFeatures.csproj

@@ -10,8 +10,6 @@
     <OutputType>Library</OutputType>
     <RootNamespace>Microsoft.CodeAnalysis.Editor</RootNamespace>
     <AssemblyName>Microsoft.CodeAnalysis.InteractiveEditorFeatures</AssemblyName>
-    <!-- Disable the architecture mismatch warning -->
-    <ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>None</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
     <TargetFrameworkVersion>v4.6</TargetFrameworkVersion>
     <CopyNuGetImplementations>false</CopyNuGetImplementations>
   </PropertyGroup>
@@ -168,4 +166,4 @@
   <ImportGroup Label="Targets">
     <Import Project="..\..\..\..\build\Targets\VSL.Imports.targets" />
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>