How to hide unnecessary parts on a chart?

[#1]

This chart was created using the "Graph Builder". The content in the red box is what I want to delete.
The left area has only 15 columns, and the middle area has only 2 columns.
I have uploaded the file, how to do it?

[#2]

I just want to achieve the following chart effect, which is done in MS Excel.

[#3 · Accepted solution]

Move your X-Group to X-axis

You can then modify the labels/grids from axis settings

[#4]

Thank you very much.

[#5]

please vote here to get the possibility also with Group X:
:双手合十: X group: restrict the values on the axis to the respective group 

[one of the top voted items in the wish list]