[FIX] purchase_triple_discount: avoid duplicated field on res.partner form view#2900

legalsylvain wants to merge 1 commit intoOCA:16.0OCA/purchase-workflow:16.0from

grap:16.0-FIX-purchase_triple_discount-hide-discount-on-partner-SLGgrap/purchase-workflow:16.0-FIX-purchase_triple_discount-hide-discount-on-partner-SLGCopy head branch name to clipboard