This method removes a specified column at runtime. It is useful in presenting columns dynamically.
- columnIndex - index to identify the column, where 0 is the first* column, 1 is the second column, etc.
*Column 0 refers to the first column as established during design-time (in Visual Designer). If movable columns is true, then the user could change the column order. removeColumn(0) removes what was originally the first column, even if the user has moved that column.