diff --git a/src/construction.jl b/src/construction.jl
index 032c3aa..af8834c 100644
--- a/src/construction.jl
+++ b/src/construction.jl
@@ -109,91 +109,6 @@ include("construction_utils.jl")
     throw(BioSequences.EncodeError(A, reinterpret(T, enc % UInt8)))
 end
 
-#=
-"Extract a full kmer at a given index of a sequence.
-Note: These methods don't do any bounds checking"
-function unsafe_extract end
-
-@inline function unsafe_extract(
-    ::TwoToFour,
-    ::Type{T},
-    seq::BioSequence,
-    from_index,
-) where {T <: Kmer}
-    data = zero_tuple(T)
-    for i in from_index:(from_index + ksize(T) - 1)
-        encoding = left_shift(UInt(1), UInt(BioSequences.extract_encoded_element(seq, i)))
-        (_, data) = leftshift_carry(data, 4, encoding)
-    end
-    T(unsafe, data)
-end
-
-@inline function unsafe_extract(
-    ::FourToTwo,
-    ::Type{T},
-    seq::BioSequence,
-    from_index,
-) where {T <: Kmer}
-    data = zero_tuple(T)
-    for i in from_index:(from_index + ksize(T) - 1)
-        encoding = UInt(BioSequences.extract_encoded_element(seq, i))::UInt
-        isone(count_ones(encoding)) || throw_uncertain(Alphabet(T), eltype(seq), encoding)
-        (_, data) = leftshift_carry(data, 2, trailing_zeros(encoding) % UInt)
-    end
-    T(unsafe, data)
-end
-
-@inline function unsafe_extract(
-    ::Copyable,
-    ::Type{T},
-    seq::BioSequence,
-    from_index,
-) where {T <: Kmer}
-    data = zero_tuple(T)
-    bps = BioSequences.bits_per_symbol(Alphabet(seq))
-    for i in from_index:(from_index + ksize(T) - 1)
-        encoding = UInt(BioSequences.extract_encoded_element(seq, i))::UInt
-        (_, data) = leftshift_carry(data, bps, encoding)
-    end
-    T(unsafe, data)
-end
-
-@inline function unsafe_extract(
-    ::AsciiEncode,
-    ::Type{T},
-    seq::AbstractVector{UInt8},
-    from_index,
-) where {T <: Kmer}
-    data = zero_tuple(T)
-    bps = BioSequences.bits_per_symbol(Alphabet(T))
-    @inbounds for i in from_index:(from_index + ksize(T) - 1)
-        byte = seq[i]
-        encoding = BioSequences.ascii_encode(Alphabet(T), byte)
-        if encoding > 0x7f
-            throw(BioSequences.EncodeError(Alphabet(T), byte))
-        end
-        (_, data) = leftshift_carry(data, bps, encoding % UInt)
-    end
-    T(unsafe, data)
-end
-
-@inline function unsafe_extract(
-    ::GenericRecoding,
-    ::Type{T},
-    seq,
-    from_index,
-) where {T <: Kmer}
-    data = zero_tuple(T)
-    bps = BioSequences.bits_per_symbol(Alphabet(T))
-    @inbounds for i in 1:ksize(T)
-        symbol = convert(eltype(T), seq[i])
-        encoding = UInt(BioSequences.encode(Alphabet(T), symbol))
-        (_, data) = leftshift_carry(data, bps, encoding)
-    end
-    T(unsafe, data)
-end
-=#
-
 ################################################
 # Constructors with full parameterisation
 ################################################