mem: update comment

renderer, WaterManager: remove unnecessary header

This was SVN commit r5450.

source/lib/res/mem.cpp

@@ -428,5 +428,5 @@ ssize_t mem_size(void* p)
 void mem_shutdown()
 {
 	// ptr2h_wrapper is currently freed at NLSO dtor time.
-	// if that's a problem, add a shutdown() method to OverrunProtector.
+	// if that's a problem, use OverrunProtector::shutdown.
 }

source/renderer/Renderer.cpp

@@ -37,7 +37,6 @@
 #include "lib/ogl.h"
 #include "lib/path_util.h"
 #include "lib/res/res.h"
-#include "lib/res/file/file.h"
 #include "lib/res/graphics/tex.h"
 #include "lib/res/graphics/ogl_tex.h"
 #include "ps/Loader.h"

source/renderer/WaterManager.cpp

@@ -9,7 +9,6 @@
 #include "precompiled.h"
 
 #include "lib/timer.h"
-#include "lib/res/file/vfs.h"
 #include "lib/res/graphics/tex.h"
 #include "lib/res/graphics/ogl_tex.h"