sanitizer_common: fix freebsd build error

Variable flags is not used. Remove it.

Suggested-by: randall77 (Keith Randall)
Review: https://reviews.llvm.org/D67928



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@372698 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/sanitizer_common/sanitizer_posix_libcdep.cpp b/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
index 69919ae..304b3a0 100644
--- a/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
+++ b/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
@@ -328,7 +328,6 @@
 
 bool MmapFixedSuperNoReserve(uptr fixed_addr, uptr size, const char *name) {
 #if SANITIZER_FREEBSD
-  int flags = 0;
   if (common_flags()->no_huge_pages_for_shadow)
     return MmapFixedNoReserve(fixed_addr, size, name);
   // MAP_NORESERVE is implicit with FreeBSD