Remove deprecated xunit.sh script

xunit.sh

@@ -1,22 +0,0 @@
-#!/usr/bin/env bash
-
-# Test for build dependencies
-hash cmake 2>/dev/null || { echo >&2 "No cmake, please run 'sudo apt-get install cmake'"; exit 1; }
-hash g++ 2>/dev/null || { echo >&2 "No g++, please run 'sudo apt-get install g++'"; exit 1; }
-hash dotnet 2>/dev/null || { echo >&2 "No dotnet, please visit https://dotnet.github.io/getting-started/"; exit 1; }
-
-# Test for lock file
-test -r test/csharp/project.lock.json || { echo >&2 "Please run 'dotnet restore' to download .NET Core packages"; exit 2; }
-
-# Run xUnit tests
-pushd test/csharp
-## Build
-dotnet build -c Linux
-## Work-around dotnet/cli#753
-cp -r -f ../../src/Microsoft.PowerShell.Host/{Modules,*.so,*.dylib} bin/Linux/netstandardapp1.5/ubuntu.14.04-x64 2>/dev/null
-## Test
-dotnet test -c Linux
-result=$?
-popd
-
-exit $result