unwind: remove upstreamed patch. Fix source build (#59641)
Fixes
```
patching file src/ptrace/_UPT_ptrauth_insn_mask.c
Hunk #1 FAILED at 49.
1 out of 1 hunk FAILED -- saving rejects to file src/ptrace/_UPT_ptrauth_insn_mask.c.rej
make[1]: *** [[buildroot]/deps/unwind.mk:43: [buildroot]/deps/srccache/libunwind-1.8.3/libunwind-missing-parameter-names.patch-applied] Error 1
make[1]: *** Waiting for unfinished jobs....
```
because the patch was backported to the v1.8 branch.
