[Utility/StringLexer] Remove dead code.

[zturner]

No need to request review when removing dead code.

[davide]

Thanks!

lldb/trunk/include/lldb/Utility/StringLexer.h

public:
   std::pair<bool, Character> NextIf(std::initializer_list<Character> cs);
 
   bool AdvanceIf(const std::string &token);
 
   Character Next();
 
   bool HasAtLeast(Size s);
 
-  bool HasAny(Character c);
-
   std::string GetUnlexed();
 
   // This will assert if there are less than s characters preceding the cursor.
   void PutBack(Size s);
 
   StringLexer &operator=(const StringLexer &rhs);
 
 private:

lldb/trunk/source/Utility/StringLexer.cpp

bool StringLexer::HasAtLeast(Size s) {
   return (m_data.size() - m_position) >= s;
 }
 
 void StringLexer::PutBack(Size s) {
   assert(m_position >= s);
   m_position -= s;
 }
 
-bool StringLexer::HasAny(Character c) {
-  return m_data.find(c, m_position) != std::string::npos;
-}
-
 std::string StringLexer::GetUnlexed() {
   return std::string(m_data, m_position);
 }
 
 void StringLexer::Consume() { m_position++; }
 
 StringLexer &StringLexer::operator=(const StringLexer &rhs) {
   if (this != &rhs) {
     m_data = rhs.m_data;
     m_position = rhs.m_position;
   }
   return *this;
 }