Unset CompilerType from Csc (#48843)

Author: jjonescz

src/RazorSdk/Targets/Microsoft.NET.Sdk.Razor.Compilation.targets

@@ -129,7 +129,6 @@ Copyright (c) .NET Foundation. All rights reserved.
          ChecksumAlgorithm="$(ChecksumAlgorithm)"
          CodeAnalysisRuleSet="$(ResolvedCodeAnalysisRuleSet)"
          CodePage="$(CodePage)"
-         CompilerType="$(RoslynCompilerType)"
          DebugType="$(DebugType)"
          DefineConstants="$(DefineConstants)"
          DelaySign="$(DelaySign)"

src/RazorSdk/Targets/Microsoft.NET.Sdk.Razor.Component.targets

@@ -195,7 +195,6 @@ Copyright (c) .NET Foundation. All rights reserved.
          ChecksumAlgorithm="$(ChecksumAlgorithm)"
          CodeAnalysisRuleSet="$(ResolvedCodeAnalysisRuleSet)"
          CodePage="$(CodePage)"
-         CompilerType="$(RoslynCompilerType)"
          DebugType="$(DebugType)"
          DefineConstants="$(DefineConstants)"
          DelaySign="$(DelaySign)"

src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.targets

@@ -1237,7 +1237,6 @@ Copyright (c) .NET Foundation. All rights reserved.
          PublicSign="$(PublicSign)"
          PathMap="$(PathMap)"
          Features="$(Features)"
-         CompilerType="$(RoslynCompilerType)"
          DelaySign="$(DelaySign)"
          Deterministic="$(Deterministic)"
          DisabledWarnings="$(DisabledWarnings)"