Remove a couple of game/-includes from the engine code

src/engine/client/serverbrowser.cpp

@@ -7,6 +7,7 @@
 
 #include <algorithm>
 #include <climits>
+#include <vector>
 
 #include <base/hash_ctxt.h>
 #include <base/math.h>

src/engine/client/serverbrowser_http.cpp

@@ -11,6 +11,7 @@
 #include <engine/storage.h>
 
 #include <memory>
+#include <vector>
 
 class CChooseMaster
 {

src/engine/serverbrowser.h

@@ -5,12 +5,13 @@
 
 #include <engine/map.h>
 #include <engine/shared/protocol.h>
-#include <game/client/ui.h>
 
 #include "kernel.h"
 
 #define DDNET_INFO "ddnet-info.json"
 
+class CUIElement;
+
 class CServerInfo
 {
 public:

src/engine/shared/demo.cpp

@@ -12,8 +12,6 @@
 #include <engine/shared/video.h>
 #endif
 
-#include <game/generated/protocol.h>
-
 #include "compression.h"
 #include "demo.h"
 #include "memheap.h"

src/engine/shared/serverinfo.cpp

@@ -1,9 +1,12 @@
 #include "serverinfo.h"
 
 #include "json.h"
+#include <base/math.h>
 #include <engine/external/json-parser/json.h>
 #include <engine/serverbrowser.h>
 
+#include <cstdio>
+
 static bool IsAllowedHex(char c)
 {
 	static const char ALLOWED[] = "0123456789abcdefABCDEF";