int sym_delete_rows(sym_environment *env, int num, int * indices)
This routine is used to delete rows from the original constraint matrix.
| sym_environment *env | INOUT | Pointer to the SYMPHONY environment. | 
| int num | IN | An integer indicating the number of rows to be deleted. | 
| int *indices | IN | An array indicating the indices of the rows to be deleted and having a size of at least num. | 
| FUNCTION_TERMINATED_NORMALLY | Function invoked successfully. | 
| FUNCTION_TERMINATED_ABNORMALLY | Function invoked unsuccessfully or one of the | 
| indices is out of the range of [0, number of variables-1] |