Remove some unnecessary methods that cause invalidations (#694)

Author: JamesWrigley

src/solvers/cholmod.jl

@@ -1287,11 +1287,9 @@ function size(F::Factor, i::Integer)
     return 1
 end
 size(F::Factor) = (size(F, 1), size(F, 2))
-axes(A::Union{Dense,Sparse,Factor}) = map(Base.OneTo, size(A))
 
 IndexStyle(::Type{<:Dense}) = IndexLinear()
 
-size(FC::FactorComponent, i::Integer) = size(FC.F, i)
 size(FC::FactorComponent) = size(FC.F)
 
 adjoint(FC::FactorComponent{Tv,:L}) where {Tv} = FactorComponent{Tv,:U}(FC.F)

src/solvers/spqr.jl

@@ -115,7 +115,6 @@ struct QRSparseQ{Tv<:CHOLMOD.VTypes,Ti<:Integer} <: AbstractQ{Tv}
 end
 
 Base.size(Q::QRSparseQ) = (size(Q.factors, 1), size(Q.factors, 1))
-Base.axes(Q::QRSparseQ) = map(Base.OneTo, size(Q))
 
 Matrix{T}(Q::QRSparseQ) where {T} = lmul!(Q, Matrix{T}(I, size(Q, 1), min(size(Q, 1), Q.n)))
 
@@ -146,7 +145,6 @@ function Base.size(F::QRSparse, i::Integer)
         throw(ArgumentError("second argument must be positive"))
     end
 end
-Base.axes(F::QRSparse) = map(Base.OneTo, size(F))
 
 # From SPQR manual p. 6
 _default_tol(A::AbstractSparseMatrixCSC) =