remove some lyrics in variables

variables are DRYer, but harder to process automatically,
and the benefit of the DRYness here wasn't substantial.
ids
Vigil, opening and ending verses of hours
syllabified; all antiphonal volumes broken

because of prepositions attached to the words following using _ which isn't handled properly
by psalmpreprocessor.rb.
I'm going to replace psalmpreprocessor with pslm.