Remove MSI from publishing pipeline (#27213)

Co-authored-by: Justin Chung <chungjustin@microsoft.com>
Co-authored-by: Aditya Patwardhan <adityap@microsoft.com>

test/powershell/Installer/WindowsInstaller.Tests.ps1

@@ -1,39 +0,0 @@
-# Copyright (c) Microsoft Corporation.
-# Licensed under the MIT License.
-Describe "Windows Installer" -Tags "Scenario" {
-
-    BeforeAll {
-        $skipTest = -not $IsWindows
-        $preRequisitesLink =  'https://aka.ms/pscore6-prereq'
-        $linkCheckTestCases = @(
-            @{ Name = "Universal C Runtime"; Url = $preRequisitesLink }
-            @{ Name = "WMF 4.0"; Url = "https://www.microsoft.com/download/details.aspx?id=40855" }
-            @{ Name = "WMF 5.0"; Url = "https://www.microsoft.com/download/details.aspx?id=50395" }
-            @{ Name = "WMF 5.1"; Url = "https://www.microsoft.com/download/details.aspx?id=54616" }
-        )
-    }
-
-    It "WiX (Windows Installer XML) file contains pre-requisites link $preRequisitesLink" -Skip:$skipTest {
-        $wixProductFile = Join-Path -Path $PSScriptRoot -ChildPath "..\..\..\assets\wix\Product.wxs"
-        (Get-Content $wixProductFile -Raw).Contains($preRequisitesLink) | Should -BeTrue
-    }
-
-    ## Running 'Invoke-WebRequest' with WMF download URLs has been failing intermittently,
-    ## because sometimes the URLs lead to a 'this download is no longer available' page.
-    ## We use a retry logic here. Retry for 5 times with 1 second interval.
-    # It "Pre-Requisistes link for '<Name>' is reachable: <url>" -TestCases $linkCheckTestCases -Skip:$skipTest {
-    It "Pre-Requisistes link for '<Name>' is reachable: <url>" -TestCases $linkCheckTestCases -Pending {
-        param ($Url)
-
-        foreach ($i in 1..5) {
-            try {
-                $result = Invoke-WebRequest $Url -UseBasicParsing
-                break;
-            } catch {
-                Start-Sleep -Seconds 1
-            }
-        }
-
-        $result | Should -Not -Be $null
-    }
-}