Merge pull request #33690 from FHenry/dev_fix_bug_from_78b438f6

fix: Sales Order Connections Tabs do not show linked Material Request or "+" button  (intoduce by #33304)
diff --git a/erpnext/selling/doctype/sales_order/sales_order_dashboard.py b/erpnext/selling/doctype/sales_order/sales_order_dashboard.py
index 5c4b578..cbc40bb 100644
--- a/erpnext/selling/doctype/sales_order/sales_order_dashboard.py
+++ b/erpnext/selling/doctype/sales_order/sales_order_dashboard.py
@@ -14,7 +14,6 @@
 		},
 		"internal_links": {
 			"Quotation": ["items", "prevdoc_docname"],
-			"Material Request": ["items", "material_request"],
 		},
 		"transactions": [
 			{