Revert "XFAIL test under Linux"

This reverts commit bf7c884.

Author: adrian-prantl

lldb/test/API/lang/swift/dwarfimporter/C/TestSwiftDWARFImporterC.py

@@ -39,7 +39,6 @@ def build(self):
     @swiftTest
     # This test needs a working Remote Mirrors implementation.
     @skipIf(oslist=['windows'])
-    @expectedFailureAll(oslist=['linux'], bugnumber='rdar://104670979')
     def test_dwarf_importer(self):
         self.build()
         target, process, thread, bkpt = lldbutil.run_to_source_breakpoint(
@@ -67,7 +66,6 @@ def test_dwarf_importer(self):
     @swiftTest
     # This test needs a working Remote Mirrors implementation.
     @skipIf(oslist=['windows'])
-    @expectedFailureAll(oslist=['linux'], bugnumber='rdar://104670979')
     def test_dwarf_importer_exprs(self):
         self.build()
         target, process, thread, bkpt = lldbutil.run_to_source_breakpoint(