[clang] Remove unused-lambda-capture in AArch64.cpp (NFC)
llvm-project/clang/lib/CodeGen/Targets/AArch64.cpp:886:26:
error: lambda capture 'TI' is not used [-Werror,-Wunused-lambda-capture]
886 | llvm::sort(Features, [&TI](const StringRef LHS, const StringRef RHS) {
| ~^~
1 error generated.
