c6x: kill ELF_CORE_COPY_FPREGS

not used anymore, now that fdpic coredump got switched to regset
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/c6x/include/asm/elf.h

@@ -39,8 +39,6 @@ do {								\
 
 #define ELF_FDPIC_CORE_EFLAGS	0
 
-#define ELF_CORE_COPY_FPREGS(...) 0 /* No FPU regs to copy */
-
 /*
  * These are used to set parameters in the core dumps.
  */