Remove some dead code.

core/fpdfdoc/cpdf_variabletext.cpp

Index: core/fpdfdoc/cpdf_variabletext.cpp
diff --git a/core/fpdfdoc/cpdf_variabletext.cpp b/core/fpdfdoc/cpdf_variabletext.cpp
index 67887400a47e940523399f7581d60ee80c227780..427cd5d306b50254228fd5ba2c75c31ad8aa7c4e 100644
--- a/core/fpdfdoc/cpdf_variabletext.cpp
+++ b/core/fpdfdoc/cpdf_variabletext.cpp
@@ -1153,9 +1153,6 @@ CPDF_VariableText::Iterator* CPDF_VariableText::GetIterator() {
   return m_pVTIterator;
 }
 
-CPDF_VariableText::Provider* CPDF_VariableText::SetProvider(
-    CPDF_VariableText::Provider* pProvider) {
-  CPDF_VariableText::Provider* pOld = m_pVTProvider;
+void CPDF_VariableText::SetProvider(CPDF_VariableText::Provider* pProvider) {
   m_pVTProvider = pProvider;
-  return pOld;
 }