Trim this fastqSequence in-place by removing <amount> nucleotides from
      the 5' end (left end).

      :param amount: the number of nucleotides to trim from the left-side of
                     this sequence.

def trimLeft(self, amount):
    """
      Trim this fastqSequence in-place by removing <amount> nucleotides from
      the 5' end (left end).

      :param amount: the number of nucleotides to trim from the left-side of
                     this sequence.
    """
    if amount == 0:
      return
    self.sequenceData = self.sequenceData[amount:]
    self.sequenceQual = self.sequenceQual[amount:]