Remove semicolon from macro define
Created by: gsjaardema
The iterator class is defined via the macro ADIOS2_CLASS_iterator
. The define ends with a semicolon. When the symbol is used in source code, the developer will add a semicolon after the symbol as is done for most code. This will result in a warning from some compilers about a double semicolon on that line (one from macro, one from line of code)