RemoteInspection: remove llvm/Config/abi-breaking.h reference

This removes the aforementioned header, assuming that the user will
manually define `LLVM_ENABLE_ABI_BREAKING_CHECKS` if they are interested
in the ABI breaking tests.

Author: compnerd

include/swift/RemoteInspection/RuntimeHeaders/llvm/Support/Error.h

@@ -15,7 +15,6 @@
 
 #include "llvm-c/Error.h"
 #include "llvm/ADT/Twine.h"
-#include "llvm/Config/abi-breaking.h"
 #include "llvm/Support/AlignOf.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/Debug.h"