[PR18809] Remove XFAIL from DebugInfo/empty.ll.

I added it in r201211.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201383 91177308-0d34-0410-b5e6-96231b3b80d8

Author: chapuni

test/DebugInfo/empty.ll

@@ -1,9 +1,6 @@
 ; RUN: llc %s -o %t -filetype=obj
 ; RUN: llvm-dwarfdump -debug-dump=line %t | FileCheck %s
 
-; PR18809
-; XFAIL: cygwin,mingw32
-
 ; Expect no line table entry since there are no functions and file references in this compile unit
 ; CHECK: .debug_line contents:
 ; CHECK: Line table prologue: