schemas: legacy: remove unused "Class" property

'Class' property is now no longer required as part of 'Aggregate'
schema.

Tested: Schema Validator Pass

Change-Id: I7bee2a6b70625dd59ad5e618da001d081d296a3a
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/schemas/legacy.json b/schemas/legacy.json
index 51ad1cf..c199817 100644
--- a/schemas/legacy.json
+++ b/schemas/legacy.json
@@ -829,9 +829,6 @@
                 "CPURequired": {
                     "$ref": "#/$defs/Types/CPURequired"
                 },
-                "Class": {
-                    "$ref": "#/$defs/Types/Class"
-                },
                 "CurrScaleFactor": {
                     "$ref": "#/$defs/Types/CurrScaleFactor"
                 },