Get props and targets from the scripts bundle. (#1756)

I'm not positive exactly what I was thinking in #976 ; probably though we'd be moving the authoritative place to the tool repo. But the result of that has been that the VS copy is shipping very old bits for a while.

Bug discvoered by @vicroms .

Author: BillyONeal

vcpkg-init/mint-standalone-bundle.ps1

@@ -98,14 +98,12 @@ try {
     Copy-Item -Path "$ArchIndependentSignedFilesRoot/scripts/applocal.ps1" -Destination 'out/scripts/buildsystems/msbuild/applocal.ps1'
 
     # None of the standalone bundles support classic mode, so turn that off in the bundled copy of the props
-    $propsContent = Get-Content "$PSScriptRoot/vcpkg.props" -Raw -Encoding Ascii
+    $propsContent = Get-Content "out/scripts/buildsystems/msbuild/vcpkg.props" -Raw -Encoding Ascii
     $classicEnabledLine = "<VcpkgEnableClassic Condition=`"'`$(VcpkgEnableClassic)' == ''`">true</VcpkgEnableClassic>"
     $classicDisabledLine = "<VcpkgEnableClassic Condition=`"'`$(VcpkgEnableClassic)' == ''`">false</VcpkgEnableClassic>"
     $propsContent = $propsContent.Replace($classicEnabledLine, $classicDisabledLine)
     Set-Content -Path "out/scripts/buildsystems/msbuild/vcpkg.props" -Value $propsContent -NoNewline -Encoding Ascii
 
-    Copy-Item -Path "$PSScriptRoot/vcpkg.targets" -Destination 'out/scripts/buildsystems/msbuild/vcpkg.targets'
-
     New-Item -Path 'out/scripts/posh-vcpkg/' -ItemType 'Directory' -Force
     Copy-Item -Path "$ArchIndependentSignedFilesRoot/scripts/posh-vcpkg.psm1" -Destination 'out/scripts/posh-vcpkg/posh-vcpkg.psm1'
     Copy-Item -Path "$ArchIndependentSignedFilesRoot/scripts/posh-vcpkg.psd1" -Destination 'out/scripts/posh-vcpkg/posh-vcpkg.psd1'