[compiler] Remove support for concurrent OSR.

src/full-codegen/arm64/full-codegen-arm64.cc

Index: src/full-codegen/arm64/full-codegen-arm64.cc
diff --git a/src/full-codegen/arm64/full-codegen-arm64.cc b/src/full-codegen/arm64/full-codegen-arm64.cc
index 0f1a90d22df353aaa98b55bd7d511abb88b60305..4dc3572c139b3d0a06a3773e466d92992bb570ac 100644
--- a/src/full-codegen/arm64/full-codegen-arm64.cc
+++ b/src/full-codegen/arm64/full-codegen-arm64.cc
@@ -4171,7 +4171,6 @@ void BackEdgeTable::PatchAt(Code* unoptimized_code,
       patcher.b(6, pl);
       break;
     case ON_STACK_REPLACEMENT:
-    case OSR_AFTER_STACK_CHECK:
       //  <decrement profiling counter>
       //  .. .. .. ..       mov x0, x0 (NOP)
       //  .. .. .. ..       ldr x16, pc+<on-stack replacement address>
@@ -4192,9 +4191,6 @@ void BackEdgeTable::PatchAt(Code* unoptimized_code,
               isolate->builtins()->InterruptCheck()->entry())) ||
          (Memory::uint64_at(interrupt_address_pointer) ==
           reinterpret_cast<uint64_t>(
-              isolate->builtins()->OsrAfterStackCheck()->entry())) ||
-         (Memory::uint64_at(interrupt_address_pointer) ==
-          reinterpret_cast<uint64_t>(
               isolate->builtins()->OnStackReplacement()->entry())));
   Memory::uint64_at(interrupt_address_pointer) =
       reinterpret_cast<uint64_t>(replacement_code->entry());
@@ -4220,9 +4216,6 @@ BackEdgeTable::BackEdgeState BackEdgeTable::GetBackEdgeState(
     if (entry == reinterpret_cast<uint64_t>(
         isolate->builtins()->OnStackReplacement()->entry())) {
       return ON_STACK_REPLACEMENT;
-    } else if (entry == reinterpret_cast<uint64_t>(
-        isolate->builtins()->OsrAfterStackCheck()->entry())) {
-      return OSR_AFTER_STACK_CHECK;
     } else {
       UNREACHABLE();
     }