Revert "Use Microsoft.CodeAnalysis.PublicApiAnalyzers to track public API surface (#4165)"

This reverts commit 6f5b1a8.

Author: RussKie

Directory.Build.props

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project>
   <Import Project="Sdk.props" Sdk="Microsoft.DotNet.Arcade.Sdk" />
-  <Import Project="$(RepositoryEngineeringDir)ApiCompatibility\PublicApiAnalyzer.props" />
 
   <!-- TFMs and their permutations -->
   <PropertyGroup>

Directory.Build.targets

@@ -7,7 +7,6 @@
   <Import Project="$(MSBuildThisFileDirectory)\eng\MSBuild\Shared.targets" />
   <Import Project="$(MSBuildThisFileDirectory)\eng\MSBuild\Generators.targets" />
   <Import Project="$(MSBuildThisFileDirectory)\eng\MSBuild\ProjectStaging.targets" />
-  <Import Project="$(RepositoryEngineeringDir)ApiCompatibility\PublicApiAnalyzer.targets" />
 
   <!-- Warning stuff -->
   <PropertyGroup>

eng/ApiCompatibility/PublicApiAnalyzer.props

@@ -67,7 +67,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageVersion Include="Microsoft.CodeAnalysis.PublicApiAnalyzers" Version="3.11.0-beta1.23355.1" />
     <PackageVersion Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.5.22" />
     <PackageVersion Include="SonarAnalyzer.CSharp" Version="8.52.0.60960" />
     <PackageVersion Include="StyleCop.Analyzers.Unstable" Version="1.2.0.507" />