File aegisub-3.3.3-declang.patch of Package aegisub

diff --git a/libaegisub/unix/util.cpp b/libaegisub/unix/util.cpp
index 4cf6721..5bb2027 100644
--- a/libaegisub/unix/util.cpp
+++ b/libaegisub/unix/util.cpp
@@ -16,21 +16,13 @@
 
 #include <cstddef>
 
-#ifdef _LIBCPP_VERSION
-#include <thread>
-#else
 #include <boost/thread.hpp>
-#endif
 
 namespace agi { namespace util {
 void SetThreadName(const char *) { }
 
 void sleep_for(int ms) {
-#ifdef __clang__
-	std::this_thread::sleep_for(std::chrono::milliseconds(ms));
-#else
 	boost::this_thread::sleep_for(boost::chrono::milliseconds(ms));
-#endif
 }
 
 } }