Remove more unused imports (F401)

Again, found by linting.

Bio/Align/bigbed.py

@@ -50,7 +50,6 @@ You are expected to use this module via the Bio.Align functions.
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # ------------------------------------------------------------------------------
 
-import array
 import copy
 import io
 import itertools

Bio/Align/bigpsl.py

@@ -23,7 +23,6 @@ import numpy as np
 from Bio.Align import Alignment
 from Bio.Align import Alignments
 from Bio.Align import bigbed
-from Bio.Align import psl
 from Bio.Align.bigbed import AutoSQLTable
 from Bio.Align.bigbed import Field
 from Bio.Seq import reverse_complement

Bio/Align/maf.py

@@ -29,12 +29,10 @@ zero-based end position. We can therefore manipulate ``start`` and
 ``start + size`` as python list slice boundaries.
 """
 
-import itertools
 import shlex
 
 from Bio.Align import Alignment
 from Bio.Align import interfaces
-from Bio.Seq import reverse_complement
 from Bio.Seq import Seq
 from Bio.SeqRecord import SeqRecord
 

Bio/Align/mauve.py

@@ -11,7 +11,6 @@ You are expected to use this module via the Bio.Align functions.
 
 from Bio.Align import Alignment
 from Bio.Align import interfaces
-from Bio.Seq import reverse_complement
 from Bio.Seq import Seq
 from Bio.SeqRecord import SeqRecord
 

Bio/Seq.py

@@ -20,7 +20,6 @@ See also the Seq_ wiki and the chapter in our tutorial:
 
 """
 
-import array
 import collections
 import numbers
 import warnings

Bio/SeqIO/FastaIO.py

@@ -13,8 +13,6 @@
 You are expected to use this module via the Bio.SeqIO functions.
 """
 
-import warnings
-
 from Bio.Seq import Seq
 from Bio.SeqRecord import SeqRecord
 

Bio/codonalign/__init__.py

@@ -6,7 +6,6 @@
 # package.
 """Code for dealing with Codon Alignments."""
 
-import copy
 import warnings
 from collections.abc import Iterable
 from collections.abc import Mapping