Fix compilation.

These lines are not needed.

They even fail to compile on some compilers.

Thanks to Han` and fred for reporting this.

include/znc/Buffer.h

@@ -47,8 +47,6 @@ protected:
 
 class CBuffer : private std::deque<CBufLine> {
 public:
-	typedef typename std::deque<CBufLine>::size_type size_type;
-
 	CBuffer(unsigned int uLineCount = 100);
 	~CBuffer();
 

include/znc/Utils.h

@@ -126,8 +126,6 @@ protected:
  */
 class CTable : protected std::vector<std::vector<CString> > {
 public:
-	typedef typename std::vector<std::vector<CString> >::size_type size_type;
-
 	CTable() {}
 	virtual ~CTable() {}