Revert "[Clang][CodeGen] Introduce the AllocToken SanitizerKind" (llvm#162413)

Reverts llvm#162098

Reason: buildbot breakage (see
llvm#162098 (comment))

Author: thurstond

clang/include/clang/Basic/Sanitizers.def

@@ -195,9 +195,6 @@ SANITIZER_GROUP("bounds", Bounds, ArrayBounds | LocalBounds)
 // Scudo hardened allocator
 SANITIZER("scudo", Scudo)
 
-// AllocToken
-SANITIZER("alloc-token", AllocToken)
-
 // Magic group, containing all sanitizers. For example, "-fno-sanitize=all"
 // can be used to disable all the sanitizers.
 SANITIZER_GROUP("all", All, ~SanitizerMask())

clang/lib/CodeGen/CodeGenFunction.cpp

@@ -846,8 +846,6 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy,
       Fn->addFnAttr(llvm::Attribute::SanitizeNumericalStability);
     if (SanOpts.hasOneOf(SanitizerKind::Memory | SanitizerKind::KernelMemory))
       Fn->addFnAttr(llvm::Attribute::SanitizeMemory);
-    if (SanOpts.has(SanitizerKind::AllocToken))
-      Fn->addFnAttr(llvm::Attribute::SanitizeAllocToken);
   }
   if (SanOpts.has(SanitizerKind::SafeStack))
     Fn->addFnAttr(llvm::Attribute::SafeStack);