[test] Remove flaky GC regression test (#106276)

Author: kotlarmilos

src/tests/GC/Regressions/v2.0-beta2/452950/452950.cs

@@ -673,7 +673,7 @@
             <Issue>https://github.com/dotnet/runtime/issues/85663</Issue>
         </ExcludeList>
     </ItemGroup>
-    
+
     <!-- Crossgen2 win-arm64 specific excludes -->
     <ItemGroup Condition="'$(XunitTestBinBase)' != '' and ('$(TestBuildMode)' == 'crossgen2' or '$(TestBuildMode)' == 'crossgen') and '$(RuntimeFlavor)' == 'coreclr' and '$(TargetArchitecture)' == 'arm64' and '$(TargetOS)' == 'windows'">
         <ExcludeList Include="$(XunitTestBinBase)/JIT/opt/Devirtualization/Comparer_get_Default/*">
@@ -3041,9 +3041,6 @@
         <ExcludeList Include = "$(XunitTestBinBase)/tracing/eventcounter/regression-25709/**">
             <Issue>https://github.com/dotnet/runtime/issues/84786</Issue>
         </ExcludeList>
-        <ExcludeList Include = "$(XunitTestBinBase)/GC/Regressions/v2.0-beta2/452950/452950/**">
-            <Issue>needs triage</Issue>
-        </ExcludeList>
         <ExcludeList Include = "$(XunitTestBinBase)/GC/Stress/Framework/ReliabilityFramework/**">
             <Issue>needs triage</Issue>
         </ExcludeList>