Remove duplicate code (#528)

Author: JannisHal

src/block_coordinate_algorithms.jl

@@ -93,34 +93,6 @@ function LazyUpdate(lazy_block::Int,refresh_rate::Int)
     return LazyUpdate(lazy_block, refresh_rate, 1)
 end
 
-"""
-The Lazy update order is discussed in "Flexible block-iterative
-analysis for the Frank-Wolfe algorithm," by Braun, Pokutta, &
-Woodstock (2024). 
-'lazy_block' is an index of a computationally expensive block to
-update;
-'refresh_rate' describes the frequency at which we perform
-a full activation; and
-'block_size' describes the number of "faster" blocks
-(i.e., those excluding 'lazy_block') activated (chosen
-uniformly at random) during each
-of the "faster" iterations; for more detail, see the
-article. If  'block_size' is unspecified, this defaults to
-1. 
-Note: This methodology is currently only proven to work
-with 'FrankWolfe.Shortstep' linesearches and a (not-yet
-implemented) adaptive method; see the article for details.
-"""
-struct LazyUpdate <: BlockCoordinateUpdateOrder 
-    lazy_block::Int
-    refresh_rate::Int
-    block_size::Int
-end
-
-function LazyUpdate(lazy_block::Int,refresh_rate::Int)
-    return LazyUpdate(lazy_block, refresh_rate, 1)
-end
-
 function select_update_indices(::FullUpdate, s::CallbackState, _)
     return [1:length(s.lmo.lmos)]
 end
@@ -232,15 +204,6 @@ function select_update_indices(update::LazyUpdate, s::CallbackState, dual_gaps)
     return push!([[rand(range(1,l)[1:l .!= update.lazy_block]) for _ in range(1,update.block_size)] for _ in 1:(update.refresh_rate -1)], range(1,l))
 end
 
-function select_update_indices(update::LazyUpdate, s::CallbackState, dual_gaps)
-    #Returns a sequence of randomized cheap indices by 
-    #excluding update.lazy_block until "refresh_rate" updates
-    #occur, then adds an update of everything while mainting
-    #randomized order.
-    l = length(s.lmo.lmos)
-    return push!([[rand(range(1,l)[1:l .!= update.lazy_block]) for _ in range(1,update.block_size)] for _ in 1:(update.refresh_rate -1)], range(1,l))
-end
-
 """
 Update step for block-coordinate Frank-Wolfe.
 These are implementations of different FW-algorithms to be used in a blockwise manner.