remove duplicated scales in config.yaml for the printing module

[MV88]

Description

There are some duplicated scales here
https://github.com/geosolutions-it/MapStore2/blob/master/java/printing/resources/geoserver/print/config.yaml#L23-L24

What kind of improvement you want to add? (check one with "x", remove the others)

• Minor changes to existing features
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

Other useful information