Removed double definition of STRING_WITH_LEN.

Previous declaration in m_string.h

client/sql_string.h

@@ -23,8 +23,6 @@
 #define NOT_FIXED_DEC			31
 #endif
 
-#define STRING_WITH_LEN(X)  ((const char*) X), ((uint) (sizeof(X) - 1))
-
 class String;
 int sortcmp(const String *a,const String *b, CHARSET_INFO *cs);
 String *copy_if_not_alloced(String *a,String *b,uint32 arg_length);