chore(i18n): drop the keys of the removed count line, usual label and open-day link

The day's count line, the usual-range label beside the focus value and
the selection bar's "Open <day>" link are gone, and so are their strings
in all seven bundles. The pulse latest-day read is listed in the dense
read guard with why it stays bounded: one type over one day, the rows the
day view reads anyway. The summaries test's database stub answers that
read.

src/__tests__/dense-measurement-read-guard.test.ts

@@ -81,6 +81,8 @@ const DENSE_TYPES: ReadonlySet<string> = new Set([
  * list, keyed `<file>::<type expression>`, with why each stays bounded.
  */
 const ALLOWED: Record<string, string> = {
+  "lib/analytics/summaries-slice.ts::(shorthand)":
+    "one hourly-mean type (pulse) over one local day, the latest: the same rows the day view reads for that day, bounded by a day, not by the sampling history",
   "lib/insights/comprehensive-generate.ts::(shorthand)":
     'Only reached for SLEEP_DURATION (guarded by `type === "SLEEP_DURATION"`); a few stage rows per night.',
   "lib/insights/derived/vascular-age.ts::VASCULAR_AGE_TYPE":