title: iOS only project contains My Mac as run destination
body: <p>After updating to Xcode 11, a framework project, with an iOS only dependency, has started to fail building from command line.</p>
  
  <p>Initially it failed with:
  <code>error: Building for Mac Catalyst requires macOS 10.15 or later. (in target 'X iOS' from project 'X')</code></p>
  
  <p>Changing <code>SUPPORTS_MACCATALYST</code> to <code>NO</code> it fails with:</p>
  
  <pre><code>xcodebuild: error: Failed to build project X with scheme X iOS.
      Reason: The run destination My Mac is not valid for Running the scheme 'X iOS'.
  </code></pre>
  
  <p>And sure enough <code>My Mac</code> is listed in the possible run destinations.</p>
  
  <p>How can I get this removed?</p>