code review 855046: runtime: delete malx, skip_depth argument to malloc

src/pkg/runtime/runtime.h

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 /*
  * basic types
  */
 typedef signed char             int8;
 typedef unsigned char           uint8;
 typedef signed short            int16;
@@ skipping 365 matching lines @@
 void    throw(int8*);
 void    panicstring(int8*);
 uint32  rnd(uint32, uint32);
 void    prints(int8*);
 void    printf(int8*, ...);
 byte*   mchr(byte*, byte, byte*);
 void    mcpy(byte*, byte*, uint32);
 int32   mcmp(byte*, byte*, uint32);
 void    memmove(void*, void*, uint32);
 void*   mal(uintptr);
-void*   malx(uintptr size, int32 skip_delta);
 uint32  cmpstring(String, String);
 String  catstring(String, String);
 String  gostring(byte*);
 String  gostringw(uint16*);
 void    initsig(void);
 int32   gotraceback(void);
 void    traceback(uint8 *pc, uint8 *sp, uint8 *lr, G* gp);
 void    tracebackothers(G*);
 int32   open(byte*, int32, ...);
 int32   write(int32, void*, int32);
@@ skipping 184 matching lines @@
 
 Hchan*  makechan(Type*, uint32);
 void    chansend(Hchan*, void*, bool*);
 void    chanrecv(Hchan*, void*, bool*);
 void    chanclose(Hchan*);
 bool    chanclosed(Hchan*);
 int32   chanlen(Hchan*);
 int32   chancap(Hchan*);
 
 void    ifaceE2I(struct InterfaceType*, Eface, Iface*);