Cleanup MSTest.Sdk now that analyzers are deps of framework (microsoft#4407)

Author: Evangelink

src/Package/MSTest.Sdk/Sdk/Runner/ClassicEngine.targets

@@ -43,9 +43,6 @@
   <ItemGroup>
     <PackageReference Include="MSTest.TestFramework" Sdk="MSTest"
                       Version="$(MSTestVersion)" VersionOverride="$(MSTestVersion)" />
-    <PackageReference Include="MSTest.Analyzers" Sdk="MSTest"
-                      Version="$(MSTestVersion)" VersionOverride="$(MSTestVersion)"
-                      Condition=" '$(EnableMSTestAnalyzers)' != 'false' " />
   </ItemGroup>
 
   <!-- Core (for test applications - not for test libraries) -->

src/Package/MSTest.Sdk/Sdk/VSTest/VSTest.targets

@@ -16,9 +16,6 @@
   <ItemGroup>
     <PackageReference Include="MSTest.TestFramework" Sdk="MSTest"
                       Version="$(MSTestVersion)" VersionOverride="$(MSTestVersion)" />
-    <PackageReference Include="MSTest.Analyzers" Sdk="MSTest"
-                      Version="$(MSTestVersion)" VersionOverride="$(MSTestVersion)"
-                      Condition=" '$(EnableMSTestAnalyzers)' != 'false' " />
   </ItemGroup>
 
   <!-- If we are a test application (not a test library) -->