[Atomics] Remove Atomics code stubs; use TF ops

src/interface-descriptors.h

Index: src/interface-descriptors.h
diff --git a/src/interface-descriptors.h b/src/interface-descriptors.h
index f41bc647e949a0912cacda552d99316db76ec7b6..378f0ce6f907f5fb4e5dee4f39f2128ce4e9f7bc 100644
--- a/src/interface-descriptors.h
+++ b/src/interface-descriptors.h
@@ -91,8 +91,7 @@ class PlatformInterfaceDescriptor;
   V(InterpreterPushArgsAndCall)               \
   V(InterpreterPushArgsAndConstruct)          \
   V(InterpreterCEntry)                        \
-  V(ResumeGenerator)                          \
-  V(AtomicsLoad)
+  V(ResumeGenerator)
 
 class CallInterfaceDescriptorData {
  public:
@@ -828,11 +827,6 @@ class ResumeGeneratorDescriptor final : public CallInterfaceDescriptor {
   DECLARE_DESCRIPTOR(ResumeGeneratorDescriptor, CallInterfaceDescriptor)
 };
 
-class AtomicsLoadDescriptor : public CallInterfaceDescriptor {
- public:
-  DECLARE_DESCRIPTOR(AtomicsLoadDescriptor, CallInterfaceDescriptor)
-};
-
 #undef DECLARE_DESCRIPTOR_WITH_BASE
 #undef DECLARE_DESCRIPTOR
 #undef DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE