[lldb][test] enable swiftEmbeddedFrameVariable

Did not notice any failures, most likely fixed by another commit.

Author: da-viper

lldb/test/API/lang/swift/embedded/frame_variable/TestSwiftEmbeddedFrameVariable.py

@@ -3,7 +3,6 @@
 from lldbsuite.test.decorators import *
 import lldbsuite.test.lldbutil as lldbutil
 
-@skipIf(bugnumber = "rdar://159531308")
 class TestSwiftEmbeddedFrameVariable(TestBase):
     @skipUnlessDarwin
     @swiftTest