Fix lint error. Clean up fixups of calls to builtins.

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
===================================================================
--- src/x64/macro-assembler-x64.cc	(revision 3021)
+++ src/x64/macro-assembler-x64.cc	(working copy)
@@ -363,7 +363,6 @@
   if (!resolved) {
     uint32_t flags =
         Bootstrapper::FixupFlagsArgumentsCount::encode(argc) |
-        Bootstrapper::FixupFlagsIsPCRelative::encode(false) |
         Bootstrapper::FixupFlagsUseCodeObject::encode(true);
     Unresolved entry = { pc_offset() - sizeof(intptr_t), flags, name };
     unresolved_.Add(entry);
@@ -1556,7 +1555,6 @@
   if (!resolved) {
     uint32_t flags =
         Bootstrapper::FixupFlagsArgumentsCount::encode(argc) |
-        Bootstrapper::FixupFlagsIsPCRelative::encode(true) |
         Bootstrapper::FixupFlagsUseCodeObject::encode(false);
     Unresolved entry =
         { pc_offset() - kCallTargetAddressOffset, flags, name };