Update specs/abtesting-v3/paths/scheduleABTest.yml

Co-authored-by: Christopher Hawke <[email protected]>

Author: Niamsy

specs/abtesting-v3/paths/scheduleABTest.yml

@@ -22,7 +22,6 @@ post:
               type: array
               description: A/B test variants.
               minItems: 2
-              maxItems: 2
               items:
                 $ref: '../common/schemas/AddABTestsVariant.yml#/AddABTestsVariant'
             scheduledAt: