Remove small unreachable path in GetLinkList().

Both callers have already checked for null and returned errors.

Change-Id: I48a7333dae36b74aed059ef5bba8bfe10ef2c2aa
Reviewed-on: https://pdfium-review.googlesource.com/c/43750
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
diff --git a/fpdfsdk/fpdf_doc.cpp b/fpdfsdk/fpdf_doc.cpp
index d3c8e23..e7b9042 100644
--- a/fpdfsdk/fpdf_doc.cpp
+++ b/fpdfsdk/fpdf_doc.cpp
@@ -51,9 +51,6 @@
 }
 
 CPDF_LinkList* GetLinkList(CPDF_Page* page) {
-  if (!page)
-    return nullptr;
-
   CPDF_Document* pDoc = page->GetDocument();
   std::unique_ptr<CPDF_LinkList>* pHolder = pDoc->LinksContext();
   if (!pHolder->get())