Cleanup #includes of (mostly a long time) unused header files.

No functional changes.

src/server/idle.c

@@ -35,7 +35,6 @@
 #include "player.h"
 #include "empio.h"
 #include "empthread.h"
-#include "proto.h"
 #include "prototypes.h"
 #include "optlist.h"
 #include "server.h"

src/server/lostitem.c

@@ -37,7 +37,6 @@
 #include "empthread.h"
 #include "file.h"
 #include "lost.h"
-#include <stdio.h>
 #include "prototypes.h"
 #include "optlist.h"
 #include "server.h"

src/server/main.c

@@ -38,7 +38,6 @@
 #endif /* aix or linux */
 
 #include <signal.h>
-#include <errno.h>
 #if !defined(_WIN32)
 #include <sys/ioctl.h>
 #endif

src/server/marketup.c

@@ -37,7 +37,6 @@
 #include "empthread.h"
 #include "file.h"
 #include "server.h"
-#include <stdio.h>
 #include "prototypes.h"
 
 /*ARGSUSED*/

src/server/shutdown.c

@@ -35,7 +35,6 @@
 #include "player.h"
 #include "empio.h"
 #include "empthread.h"
-#include "proto.h"
 #include "nat.h"
 #include "file.h"
 #include <time.h>