slirp: Remove some unused code from slirp.h

These hunks are apparently not used anymore, so let's delete them.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NSamuel Thibault <samuel.thibault@ens-lyon.org>

slirp/slirp.h

@@ -58,10 +58,6 @@ typedef char *caddr_t;
 # include <sys/filio.h>
 #endif
 
-#ifdef USE_PPP
-#include <ppp/slirppp.h>
-#endif
-
 /* Avoid conflicting with the libc insque() and remque(), which
    have different prototypes. */
 #define insque slirp_insque
@@ -96,10 +92,6 @@ typedef char *caddr_t;
 #include "if.h"
 #include "main.h"
 #include "misc.h"
-#ifdef USE_PPP
-#include "ppp/pppd.h"
-#include "ppp/ppp.h"
-#endif
 
 #include "bootp.h"
 #include "tftp.h"
@@ -237,18 +229,12 @@ extern Slirp *slirp_instance;
 #define NULL (void *)0
 #endif
 
-#ifndef FULL_BOLT
 void if_start(Slirp *);
-#else
-void if_start(struct ttys *);
-#endif
 
 #ifndef _WIN32
 #include <netdb.h>
 #endif
 
-#define DEFAULT_BAUD 115200
-
 #define SO_OPTIONS DO_KEEPALIVE
 #define TCP_MAXIDLE (TCPTV_KEEPCNT * TCPTV_KEEPINTVL)
 
@@ -306,14 +292,6 @@ int tcp_emu(struct socket *, struct mbuf *);
 int tcp_ctl(struct socket *);
 struct tcpcb *tcp_drop(struct tcpcb *tp, int err);
 
-#ifdef USE_PPP
-#define MIN_MRU MINMRU
-#define MAX_MRU MAXMRU
-#else
-#define MIN_MRU 128
-#define MAX_MRU 16384
-#endif
-
 #ifndef _WIN32
 #define min(x,y) ((x) < (y) ? (x) : (y))
 #define max(x,y) ((x) > (y) ? (x) : (y))