删除使用SpringLayout创建的文本字段

I'm using the code from the example on the official page of Oracle. The one for sorting and filtering table data. In the original variant it has two fields - one for entering a filtering criteria and second for showing which row from the grid is selected. I don't need the second one, want to leave just the filter field, but it seems that I miss something. Below is my code with comments on the code I thought was unnecessary :I'm using the code from the example on the offi