Remove code for handling optional MaskedSequences
|Reported by:||Nicklas Nordborg||Owned by:||Nicklas Nordborg|
Description (last modified by )
When the masking step has been introduced to the Hisat pipeline again (see #1015), all places in the code that works with MaskedSequences can be simplified since we no longer need to consider two different cases.
The "Delete unmasked Hisat alignments" wizard can also be removed.