Just like we did in commit 0214184b2d for investments, we're removing
some possible optimizations (we don't have any benchmarks proving they
affect performance at all) in order to simplify the code.
The investement votes component `delegate` code was accidentally left
but isn't used since commit 0214184b2, so we're removing it now that
we're removing the `voted_for?` helper method.
We were very inconsistent regarding these rules.
Personally I prefer no empty lines around blocks, clases, etc... as
recommended by the Ruby style guide [1], and they're the default values
in rubocop, so those are the settings I'm applying.
The exception is the `private` access modifier, since we were leaving
empty lines around it most of the time. That's the default rubocop rule
as well. Personally I don't have a strong preference about this one.
[1] https://rubystyle.guide/#empty-lines-around-bodies
