Remove obsolete distance switch in SubStringStub::Generate.

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 4ccda2df8b1e2040c73a8fbe858677ad64f1911f..a3fb077d3c8b0814615cbf67599af7fe6188699f 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -4224,15 +4224,9 @@ void SubStringStub::Generate(MacroAssembler* masm) {
     STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0);
     STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0);
     __ testb(rbx, Immediate(kStringEncodingMask));
-    // Make long jumps when allocations tracking is on due to
-    // RecordObjectAllocation inside MacroAssembler::Allocate.
-    Label::Distance jump_distance =
-        masm->isolate()->heap_profiler()->is_tracking_allocations()
-        ? Label::kFar
-        : Label::kNear;
-    __ j(zero, &two_byte_slice, jump_distance);
+    __ j(zero, &two_byte_slice, Label::kNear);
     __ AllocateAsciiSlicedString(rax, rbx, r14, &runtime);
-    __ jmp(&set_slice_header, jump_distance);
+    __ jmp(&set_slice_header, Label::kNear);
     __ bind(&two_byte_slice);
     __ AllocateTwoByteSlicedString(rax, rbx, r14, &runtime);
     __ bind(&set_slice_header);