Remove scr from 700$4 and 710$4 in Prints

[jenniferward]

In our templates for printed music, we have scr as a function in 700$4 and 710$4. We can't think of a reason to have a copyist in the main bibliographic level, so can it please be removed? We've cleared it from the data. It was only used about 20 times.

• edition
• libretto_edition
• theoretica_edition
• edition_content
• libretto_edition_content
• theoretica_edition_content

(scr should stay in the holdings.)