schemas: legacy: remove unused 'OffsetValue'

'OffsetValue' is no longer required as part of 'Aggregate' schema.

Tested: Schema Validator Pass

Change-Id: I1b0f9e2131ff9137d52e2bd1a256f0b8c2dee407
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/schemas/legacy.json b/schemas/legacy.json
index 4db3077..0d7e803 100644
--- a/schemas/legacy.json
+++ b/schemas/legacy.json
@@ -850,9 +850,6 @@
                 "MinReading": {
                     "$ref": "#/$defs/Types/MinReading"
                 },
-                "OffsetValue": {
-                    "$ref": "#/$defs/Types/OffsetValue"
-                },
                 "Polling": {
                     "$ref": "#/$defs/Types/Polling"
                 },