[lldb] Re-enable TestSwiftStaticArchiveTwoSwiftmodules

Fixed by #2019

Author: JDevlieghere

lldb/test/API/lang/swift/clangimporter/static_archive/TestSwiftStaticArchiveTwoSwiftmodules.py

@@ -25,7 +25,6 @@ def setUp(self):
         TestBase.setUp(self)
 
     # Don't run ClangImporter tests if Clangimporter is disabled.
-    @skipIfDarwin # 'rdar://68891755'
     @skipIf(setting=('symbols.use-swift-clangimporter', 'false'))
     @skipUnlessDarwin
     @swiftTest