Delete some dead code in FileScope

hphpc relic. I discovered this while working on $GLOBALS-in-HphpArray.

hphp/compiler/analysis/file_scope.cpp

@@ -193,13 +193,6 @@ int FileScope::getGlobalAttribute() const {
   return m_attributes.back();
 }
 
-bool FileScope::needPseudoMainVariables() const {
-  VariableTablePtr variables = m_pseudoMain->getVariables();
-  return
-    variables->getAttribute(VariableTable::ContainsDynamicVariable) ||
-    variables->getSymbols().size() > 0;
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 
 ExpressionPtr FileScope::getEffectiveImpl(AnalysisResultConstPtr ar) const {

hphp/compiler/analysis/file_scope.h

@@ -180,16 +180,8 @@ public:
   const std::string &pseudoMainName();
   void outputFileCPP(AnalysisResultPtr ar, CodeGenerator &cg);
   bool load();
-  bool needPseudoMainVariables() const;
   std::string outputFilebase() const;
 
-  void addPseudoMainVariable(const std::string &name) {
-    m_pseudoMainVariables.insert(name);
-  }
-  std::set<std::string> &getPseudoMainVariables() {
-    return m_pseudoMainVariables;
-  }
-
   FunctionScopeRawPtr getPseudoMain() const {
     return m_pseudoMain;
   }
@@ -217,7 +209,6 @@ private:
   vertex_descriptor m_vertex;
 
   std::string m_pseudoMainName;
-  std::set<std::string> m_pseudoMainVariables;
   BlockScopeSet m_providedDefs;
   std::set<std::string> m_redecBases;