Remove unnecessary header includes.

src/Common/Timer.cpp

@@ -19,7 +19,6 @@
 #else
 	#include <sys/time.h>
 	#include <x86intrin.h>
-	#include <features.h>
 #endif
 
 namespace sw

src/Renderer/Clipper.cpp

@@ -15,8 +15,6 @@
 #include "Renderer.hpp"
 #include "Debug.hpp"
 
-#include <malloc.h>
-
 namespace sw
 {
 	Clipper::Clipper()

src/Renderer/Context.cpp

@@ -20,7 +20,6 @@
 #include "Debug.hpp"
 
 #include <string.h>
-#include <malloc.h>
 
 namespace sw
 {

src/Renderer/Renderer.cpp

@@ -28,8 +28,6 @@
 #include "Debug.hpp"
 #include "Reactor/Reactor.hpp"
 
-#include <malloc.h>
-
 #undef max
 
 bool disableServer = true;