[macos] macos 13: retire VS Mac (#8213)

due to official retirement of Visual Studio for Mac, let us drop it
from macos-13

images/macos/templates/macOS-13.anka.pkr.hcl

@@ -204,7 +204,6 @@ build {
       "./provision/core/stack.sh",
       "./provision/core/cocoapods.sh",
       "./provision/core/android-toolsets.sh",
-      "./provision/core/vsmac.sh",
       "./provision/core/apache.sh",
       "./provision/core/vcpkg.sh",
       "./provision/core/safari.sh",

images/macos/templates/macOS-13.arm64.anka.pkr.hcl

@@ -196,7 +196,6 @@ build {
       "./provision/core/rust.sh",
       "./provision/core/gcc.sh",
       "./provision/core/cocoapods.sh",
-      "./provision/core/vsmac.sh",
       "./provision/core/safari.sh",
       "./provision/core/bicep.sh",
       "./provision/core/codeql-bundle.sh"

images/macos/toolsets/toolset-13.json

@@ -18,12 +18,6 @@
             ]
         }
     },
-    "xamarin": {
-        "vsmac": {
-            "default": "2022",
-            "versions": [ "2022" ]
-        }
-    },
     "java": {
         "default": "17",
         "versions": [ "8", "11", "17" ]