Silence expected and harmless errors

lsteamclient/gen_wrapper.py

@@ -1237,6 +1237,8 @@ for sdkver in sdk_versions:
 
         diagnostics = list(linux_build.diagnostics)
         if len(diagnostics) > 0:
+            # Ignore known and harmless issues
+            if not(len(diagnostics) == 1 and "This file isn't used any more" in diagnostics[0].spelling):
                 print('There were parse errors')
                 pprint.pprint(diagnostics)
         else: