Remove stale novoalign import from test_assembly.py

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: dpark01

tests/unit/assemble/test_assembly.py

@@ -23,14 +23,10 @@
 import viral_ngs.assemble.skani
 import viral_ngs.assemble.wgsim
 import viral_ngs.core.minimap2
-import viral_ngs.core.novoalign
 import viral_ngs.core.picard
 import viral_ngs.core.samtools
 from tests import TestCaseWithTmp, _CPUS, IS_ARM
 
-# Skip reason for x86-only tools
-SKIP_X86_ONLY_REASON = "novoalign requires x86-only bioconda package (not available on ARM)"
-
 
 def makeFasta(seqs, outFasta):
     with open(outFasta, 'wt') as outf: