utils: make unify SDKSettings plist and json

Alter the PList and JSON to match contents. While the primary consumer
for the PList is SPM, this synchronises the two just in case. This is in
response to feedback from @jakepetroules.

Author: compnerd

utils/build.ps1

@@ -2283,15 +2283,6 @@ function Build-ExperimentalRuntime {
 }
 
 function Write-SDKSettings([OS] $OS) {
-  $SDKSettings = @{
-    DefaultProperties = @{
-    }
-  }
-  if ($OS -eq [OS]::Windows) {
-    $SDKSettings.DefaultProperties.DEFAULT_USE_RUNTIME = "MD"
-  }
-  Write-PList -Settings $SDKSettings -Path "$(Get-SwiftSDK $OS)\SDKSettings.plist"
-
   $SDKSettings = @{
     CanonicalName = $OS.ToString().ToLowerInvariant()
     DisplayName = $OS.ToString()
@@ -2328,6 +2319,7 @@ function Write-SDKSettings([OS] $OS) {
     }
   }
   $SDKSettings | ConvertTo-JSON -Depth 4 | Out-FIle -FilePath "$(Get-SwiftSDK $OS)\SDKSettings.json"
+  Write-PList -Settings $SDKSettings -Path "$(Get-SwiftSDK $OS)\SDKSettings.plist"
 }
 
 function Build-Dispatch([Hashtable] $Platform) {