Un-XFAIL TestExitDuringBreak.py for linux

This test is passing now on linux, and probably has been passing since
r282993.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@349479 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/TestExitDuringBreak.py b/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/TestExitDuringBreak.py
index c62990c..76c2c47 100644
--- a/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/TestExitDuringBreak.py
+++ b/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/TestExitDuringBreak.py
@@ -23,9 +23,6 @@
         # Find the line number for our breakpoint.
         self.breakpoint = line_number('main.cpp', '// Set breakpoint here')
 
-    @expectedFailureAll(
-        oslist=["linux"],
-        bugnumber="llvm.org/pr15824 thread states not properly maintained")
     def test(self):
         """Test thread exit during breakpoint handling."""
         self.build(dictionary=self.getBuildFlags())