Clean compiling warnings on Linux (part2)

xfa/src/fxfa/src/app/xfa_ffsignature.cpp

Index: xfa/src/fxfa/src/app/xfa_ffsignature.cpp
diff --git a/xfa/src/fxfa/src/app/xfa_ffsignature.cpp b/xfa/src/fxfa/src/app/xfa_ffsignature.cpp
index b81f16f4bcf5b739c246cb3ffed10dbada027c4c..7b5930d1e4fc7187aa283212c3316a6a54946d96 100644
--- a/xfa/src/fxfa/src/app/xfa_ffsignature.cpp
+++ b/xfa/src/fxfa/src/app/xfa_ffsignature.cpp
@@ -87,13 +87,6 @@ FX_BOOL CXFA_FFSignature::OnRButtonDblClk(FX_DWORD dwFlags,
                                           FX_FLOAT fy) {
   return FALSE;
 }
-
-FX_BOOL CXFA_FFSignature::OnSetFocus() {
-  return FALSE;
-}
-FX_BOOL CXFA_FFSignature::OnKillFocus() {
-  return FALSE;
-}
 FX_BOOL CXFA_FFSignature::OnKeyDown(FX_DWORD dwKeyCode, FX_DWORD dwFlags) {
   return FALSE;
 }