Revert "feat(dashboard): send the glucose card in the owner's glucose unit"

This reverts commit 9455b64375.

docs/api/openapi.yaml

@@ -71896,10 +71896,8 @@ components:
           anyOf:
             - type: string
             - type: "null"
-          description: "Explicit unit token. When set it wins over `unitKey`. Set on the `sleep` card (`h`, because its value is a
-            per-night total in hours rather than the canonical SLEEP_DURATION minutes) and, since v1.40.0, on the
-            `glucose` card: the record owner's glucose unit (`mg/dL` or `mmol/L`), with `latestValue`, `secondaryValue`
-            and `sparkline` converted to it (mmol/L to one decimal). Null on every other kind."
+          description: Explicit unit token, set only on the `sleep` card (`h`, because its value is a per-night total in hours
+            rather than the canonical SLEEP_DURATION minutes). Null on every other kind.
         sleepStages:
           anyOf:
             - type: object