Clean up from previous PR (#8863)

This addresses some feedback from #8762

build.cmd

@@ -1,7 +1,7 @@
 @echo off
 setlocal
 
-set _args=-restore -build /p:_SelfContainedWasSpecified=true %*
+set _args=-restore -build %*
 if "%~1"=="-?" set _args=-help
 
 powershell -ExecutionPolicy ByPass -NoProfile -Command "& '%~dp0eng\common\build.ps1'" %_args%

src/Razor/src/rzls/rzls.csproj

@@ -6,7 +6,6 @@
     <OutputType>Exe</OutputType>
     <Description>Razor is a markup syntax for adding server-side logic to web pages. This package contains a Razor language server.</Description>
     <EnableApiCheck>false</EnableApiCheck>
-    <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
     <RuntimeIdentifiers Condition="$([MSBuild]::IsOSPlatform('Windows'))">win-x64;win-x86;win-arm64</RuntimeIdentifiers>
     <RuntimeIdentifiers Condition="$([MSBuild]::IsOSPlatform('Linux'))">linux-x64;linux-musl-x64;linux-arm64;linux-musl-arm64</RuntimeIdentifiers>
     <RuntimeIdentifiers Condition="$([MSBuild]::IsOSPlatform('OSX'))">osx-x64;osx-arm64</RuntimeIdentifiers>