[PATCH] gdb/amd64: clean up unused variable

[Enze Li]

When building with clang 15, I got this,

  CXX    amd64-tdep.o
amd64-tdep.c:1410:13: error: variable 'insn' set but not used[-Werror,-Wunused-but-set-variable]
    gdb_byte *insn = insn_details->raw_insn + modrm_offset;
                ^
1 error generated.

The function that uses this variable has been removed in this commit,

commit 870f88f7551b0f2d6aaaa36fb684b5ff8f468107
Date:   Mon Apr 18 13:16:27 2016 -0400

    remove trivialy unused variables

Fix this by removing unused variable.

Tested by rebuilding on x86_64-linux with clang 15 and gcc 12.
---
 gdb/amd64-tdep.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/gdb/amd64-tdep.c b/gdb/amd64-tdep.c
index 0563b32a54bf..3fbbf20fc2b1 100644
--- a/gdb/amd64-tdep.c
+++ b/gdb/amd64-tdep.c
@@ -1407,14 +1407,12 @@ fixup_riprel (struct gdbarch *gdbarch,
 {
   const struct amd64_insn *insn_details = &dsc->insn_details;
   int modrm_offset = insn_details->modrm_offset;
-  gdb_byte *insn = insn_details->raw_insn + modrm_offset;
   CORE_ADDR rip_base;
   int insn_length;
   int arch_tmp_regno, tmp_regno;
   ULONGEST orig_value;
 
   /* %rip+disp32 addressing mode, displacement follows ModRM byte.  */
-  ++insn;
 
   /* Compute the rip-relative address.	*/
   insn_length = gdb_buffered_insn_length (gdbarch, dsc->insn_buf.data (),
-- 
2.37.1