fix(qbasepileup): chrM was automatically changed to chrMT

[newellf]

Fix to remove condition where chrM was automatically changed to chrMT, and so was failing with GRCh38 chrM SNPs

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Updated qbasepileup tests

Are WDL Updates Required?

No

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[holmeso]

looks good