Remove ASM_UNIMPLEMENTED from Builtins::Generate_FunctionCall

src/a64/builtins-a64.cc

Index: src/a64/builtins-a64.cc
diff --git a/src/a64/builtins-a64.cc b/src/a64/builtins-a64.cc
index 6bed82257de6d6dca5756c408eaa0bf27e20a500..e61d4a48db7cf6cfe6016988dd723654aad078d3 100644
--- a/src/a64/builtins-a64.cc
+++ b/src/a64/builtins-a64.cc
@@ -1116,7 +1116,6 @@ void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
   // x4: call type (0: JS function, 1: function proxy, 2: non-function)
   { Label function, non_proxy;
     __ Cbz(x4, &function);
-    ASM_UNIMPLEMENTED("Builtins::Generate_FunctionCall non-function");
     // Expected number of arguments is 0 for CALL_NON_FUNCTION.
     __ Mov(x2, 0);
     __ SetCallKind(x5, CALL_AS_METHOD);