Eliminate warning: unused variable sha384_initial_hash_value

This fix reverts
3dab72b4c12b33090c81e57512551616830c60a8
which is no longer needed since it has been superseded by
a7c957f46062ccb31481c2ddd38b147b73b7dfb0
Eliminate warning: unused function copy_opcode

Remove inline function no longer called since
52516bbfc63a7cd53202daf42e817e7bbde98f09

dyninst.c:276:20: warning: unused function 'copy_opcode' [-Wunused-function]
static inline void copy_opcode(zz_func to_table[256], zz_func from_table...