DB-959: handle obsoletion of "in vitro construct" child terms

data/cv_cvterm.yaml

@@ -46,8 +46,7 @@ FlyBase miscellaneous CV: [
     'CRISPR/Cas9', 'amorphic allele - molecular evidence', 'assay', 'biosample', 'biotic stimulus study', 'cell isolation', 'chemical entity', 'colocalizes_with', 'comment',
     'contributes_to', 'disease implicated variant', 'evidence_code', 
     'environ1', 'environ2', 'environ3','environ4', 'environ5', 'faint', 'functional group', 'female',
-    'in vitro construct - amino acid replacement', 'in vitro construct - coding region fusion', 
-    'in vitro construct - regulatory fusion',
+    'in vitro construct',
     'inferred from direct assay', 'inferred from mutant phenotype', 'isolated cells', 'natural population',
     'male', 'misc 1', 'misc 2', 'misc 3', 'multi-individual sample',
     'pheno1', 'pheno2', 'pheno3', 'pheno4', 'pheno5',