diff --git a/tools/drawergen/drawergen.cpp b/tools/drawergen/drawergen.cpp
index 8709ebb95..dfe5fc11b 100644
--- a/tools/drawergen/drawergen.cpp
+++ b/tools/drawergen/drawergen.cpp
@@ -617,8 +617,7 @@ std::string LLVMProgram::DumpModule()
 }
 
 /////////////////////////////////////////////////////////////////////////////
-#include <chrono>
-#include <thread>
+
 int main(int argc, char **argv)
 {
 	if (argc != 2)
@@ -661,8 +660,5 @@ int main(int argc, char **argv)
 	//LLVMDrawers drawersAVX("sandybridge");
 	//LLVMDrawers drawersAVX2("haswell");
 
-	using namespace std::chrono_literals;
-	std::this_thread::sleep_for(2s); // Doh! Silly OS!
-
 	return 0;
 }