Remove duplicate function

Author: blegat

src/Utilities/model.jl

@@ -208,17 +208,6 @@ function MOI.delete(model::AbstractModel, vis::Vector{VI})
         MOI.delete(model, vi)
     end
 end
-function MOI.delete(model::AbstractModel, vis::Vector{VI})
-    # Delete `VectorOfVariables(vis)` constraints as otherwise, it will error
-    # when removing variables one by one.
-    vov_to_remove = broadcastvcat(constrs -> _vector_of_variables_with(constrs, vis), model)
-    for ci in vov_to_remove
-        MOI.delete(model, ci)
-    end
-    for vi in vis
-        MOI.delete(model, vi)
-    end
-end
 
 function MOI.is_valid(model::AbstractModel,
                       ci::CI{MOI.SingleVariable, S}) where {S}