revtex4-1.layout: remove unnecessary preamble code

- \lovname was already added to REVTeX 4.1 in 2010
- REVTeX does purposely not allow to color text, see the discussion in bug #4625
revtex4-1.layout: REVTeX 4.1 does not provide a class option "manuscript"

this is a leftover from the ancient REVTeX 4.0 times