[Sheriff] Revert "Add support for keyed-call on arrays of fast elements"

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index c4cb64289aaf9dd02cabe793a5cbb2c4c1004020..a1216466df133c9a45c992d78cd3c3a981521c94 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1323,10 +1323,8 @@ LInstruction* LChunkBuilder::DoCallNewArray(HCallNewArray* instr) {
 LInstruction* LChunkBuilder::DoCallFunction(HCallFunction* instr) {
   LOperand* context = UseFixed(instr->context(), rsi);
   LOperand* function = UseFixed(instr->function(), rdi);
-  LCallFunction* call = new(zone()) LCallFunction(context, function);
-  LInstruction* result = DefineFixed(call, rax);
-  if (instr->IsTailCall()) return result;
-  return MarkAsCall(result, instr);
+  LCallFunction* result = new(zone()) LCallFunction(context, function);
+  return MarkAsCall(DefineFixed(result, rax), instr);
 }