rtld: fix warnings about redundant declarations

Fix warnings about redundant declarations in rtld
when libthr in increased to WARNS=6.

Reviewed by:	kib
MFC after:	3 days
Sponsored by:	Dell EMC
Differential Revision:	https://reviews.freebsd.org/D10934

libexec/rtld-elf/arm/rtld_machdep.h

@@ -67,11 +67,6 @@ typedef struct {
     round(prev_offset + prev_size, align)
 #define calculate_tls_end(off, size)    ((off) + (size))
 	
-/*
- * Lazy binding entry point, called via PLT.
- */
-void _rtld_bind_start(void);
-
 extern void *__tls_get_addr(tls_index *ti);
 
 #define	RTLD_DEFAULT_STACK_PF_EXEC	PF_X

libexec/rtld-elf/mips/rtld_machdep.h

@@ -67,11 +67,6 @@ typedef struct {
     round(prev_offset + prev_size, align)
 #define calculate_tls_end(off, size)    ((off) + (size))
 
-/*
- * Lazy binding entry point, called via PLT.
- */
-void _rtld_bind_start(void);
-
 extern void *__tls_get_addr(tls_index *ti);
 
 #define	RTLD_DEFAULT_STACK_PF_EXEC	PF_X

libexec/rtld-elf/powerpc/rtld_machdep.h

@@ -53,11 +53,6 @@ Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
 #define	call_ifunc_resolver(ptr) \
 	(((Elf_Addr (*)(void))ptr)())
 
-/*
- * Lazy binding entry point, called via PLT.
- */
-void _rtld_bind_start(void);
-
 /*
  * PLT functions. Not really correct prototypes, but the
  * symbol values are needed.

libexec/rtld-elf/powerpc64/rtld_machdep.h

@@ -53,11 +53,6 @@ Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
 #define	call_ifunc_resolver(ptr) \
 	(((Elf_Addr (*)(void))ptr)())
 
-/*
- * Lazy binding entry point, called via PLT.
- */
-void _rtld_bind_start(void);
-
 /*
  * TLS
  */

libexec/rtld-elf/riscv/rtld_machdep.h

@@ -79,11 +79,6 @@ Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
 #define	call_ifunc_resolver(ptr) \
 	(((Elf_Addr (*)(void))ptr)())
 
-/*
- * Lazy binding entry point, called via PLT.
- */
-void _rtld_bind_start(void);
-
 /*
  * TLS
  */