Remove CFX_RTFBreak::GetLastPositionedTab()

It is uncalled.

Change-Id: I148d0a040aac1aa4a4c5d46863fb0b061112ab12
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/64554
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

xfa/fgas/layout/cfx_rtfbreak.cpp

diff --git a/xfa/fgas/layout/cfx_rtfbreak.cpp b/xfa/fgas/layout/cfx_rtfbreak.cpp
index 87740d5..71f79ed 100644
--- a/xfa/fgas/layout/cfx_rtfbreak.cpp
+++ b/xfa/fgas/layout/cfx_rtfbreak.cpp
@@ -55,10 +55,6 @@
   m_pUserData = pUserData;
 }
 
-int32_t CFX_RTFBreak::GetLastPositionedTab() const {
-  return m_PositionedTabs.empty() ? m_iLineStart : m_PositionedTabs.back();
-}
-
 bool CFX_RTFBreak::GetPositionedTab(int32_t* iTabPos) const {
   auto it = std::upper_bound(m_PositionedTabs.begin(), m_PositionedTabs.end(),
                              *iTabPos);

xfa/fgas/layout/cfx_rtfbreak.h

diff --git a/xfa/fgas/layout/cfx_rtfbreak.h b/xfa/fgas/layout/cfx_rtfbreak.h
index dced48e..2a722b0 100644
--- a/xfa/fgas/layout/cfx_rtfbreak.h
+++ b/xfa/fgas/layout/cfx_rtfbreak.h
@@ -53,7 +53,6 @@
   CFX_BreakType AppendChar_Control(CFX_Char* pCurChar);
   CFX_BreakType AppendChar_Arabic(CFX_Char* pCurChar);
   CFX_BreakType AppendChar_Others(CFX_Char* pCurChar);
-  int32_t GetLastPositionedTab() const;
   bool GetPositionedTab(int32_t* iTabPos) const;
 
   int32_t GetBreakPos(std::vector<CFX_Char>& tca,