Remove unused variable in pdfium_engine.

pdf/pdfium/pdfium_engine.cc

Index: pdf/pdfium/pdfium_engine.cc
diff --git a/pdf/pdfium/pdfium_engine.cc b/pdf/pdfium/pdfium_engine.cc
index 05f73098ec7870b45d04f26cc6b176a2e21fb2f8..08e869de6e40c95f10dd6b9a4b9d46ea3c83b558 100644
--- a/pdf/pdfium/pdfium_engine.cc
+++ b/pdf/pdfium/pdfium_engine.cc
@@ -1706,7 +1706,6 @@ bool PDFiumEngine::OnMouseMove(const pp::MouseInputEvent& event) {
     }
 
     client_->UpdateCursor(cursor);
-    pp::Point point = event.GetPosition();
     std::string url = GetLinkAtPosition(event.GetPosition());
     if (url != link_under_cursor_) {
       link_under_cursor_ = url;