Removes superfluous spotted owl compute variables

Compute variables (CANCOV_C, TPAGE19, TPAGE29, TPAGEC39, BAAGE1, BACGE1,
QMDC_DOM) deleted, these calculations now embedded within the NSO
compute statements.
Removes files for variants not modeled for BLM

BM and EC variants not included in BLM analysis, associated files now
removed from this folder.