Revert "XFAIL test under Linux"

This reverts commit 020c465.

Author: adrian-prantl

lldb/test/API/lang/swift/nonmodular-include/TestSwiftNonmodularInclude.py

@@ -13,5 +13,4 @@
 from lldbsuite.test.decorators import *
 
 lldbinline.MakeInlineTest(__file__, globals(),
-                          decorators=[swiftTest,skipIf(oslist=['windows']),
-                                      expectedFailureAll(oslist=['linux'], bugnumber='rdar://104681427')])
+                          decorators=[swiftTest,skipIf(oslist=['windows'])])