Remove Node-Externals allowed binary (dotnet#42399)

Author: MichaelSimons

src/SourceBuild/content/eng/allowed-sb-binaries.txt

@@ -38,7 +38,6 @@ src/aspnetcore/src/**/Samples/**/*.woff*
 src/aspnetcore/src/Components/benchmarkapps/BlazingPizza.Server/wwwroot/css/font/quicksand-v8-latin-*.woff*
 src/aspnetcore/src/Components/Web.JS/dist/Release/blazor.*.js # JavaScript files with a null bytes
 src/aspnetcore/src/ProjectTemplates/Web.ProjectTemplates/**/app.db
-src/aspnetcore/src/submodules/Node-Externals/cache/**/* # https://github.com/dotnet/source-build/issues/4161
 
 # fsharp
 src/fsharp/src/fsi/fsi.res # Icon