[lldb][test] Un-XFAIL TestCxxFrameFormat.test for now
This was XPASSing on the linux-win remote CI jobs.
Since we're now compiling with DWARF (not PDB), lets see if these pass
on Windows again.
diff --git a/lldb/test/Shell/Settings/TestCxxFrameFormat.test b/lldb/test/Shell/Settings/TestCxxFrameFormat.test
index 3751dfa..d2d89b7 100644
--- a/lldb/test/Shell/Settings/TestCxxFrameFormat.test
+++ b/lldb/test/Shell/Settings/TestCxxFrameFormat.test
@@ -1,5 +1,3 @@
-# XFAIL: system-windows
-
# Test the plugin.cplusplus.display.function-name-format setting.
# RUN: split-file %s %t