Remove the Susquehanna @ Sunbury header strip

The sunbury-flood pipeline is retired and api.c0smere.net/sunbury/forecast
is gone. The strip was fail-closed, so it was already hidden; this removes
the dead markup and fetch.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/layouts/Base.astro

@@ -108,10 +108,6 @@ const pageUrl = new URL(Astro.url.pathname, Astro.site);
                   <span class="live-dot" aria-hidden="true" />
                   <span id="live-spotify" />
                 </div>
-                <div id="sby-stats" class="live-stats" hidden>
-                  <span class="live-dot" id="sby-dot" aria-hidden="true" />
-                  <span id="live-sby" />
-                </div>
                 <div id="knb-stats" class="live-stats" hidden>
                   <span class="live-dot" id="knb-dot" aria-hidden="true" />
                   <span id="live-knb" />
@@ -354,52 +350,6 @@ const pageUrl = new URL(Astro.url.pathname, Astro.site);
       }
     </script>
 
-    <script>
-      // Homepage Susquehanna strip: live stage + the 48h quantile stage
-      // forecast from the sunbury-flood pipeline. Fail-closed.
-      const sbyRow = document.getElementById('sby-stats');
-      if (sbyRow) {
-        try {
-          const res = await fetch('https://api.c0smere.net/sunbury/forecast');
-          if (!res.ok) throw new Error(String(res.status));
-          const f = await res.json();
-          const h48 =
-            f.horizons.find((h: any) => h.horizon_h === 48) ??
-            f.horizons[f.horizons.length - 1];
-          const maxProb = Math.max(
-            ...f.horizons.map((h: any) => h.prob_above_flood),
-          );
-          document
-            .getElementById('sby-dot')!
-            .classList.add(
-              maxProb >= 0.3
-                ? 'knb-dot-packed'
-                : maxProb >= 0.05
-                  ? 'knb-dot-typical'
-                  : 'knb-dot-quiet',
-            );
-          const slot = document.getElementById('live-sby')!;
-          const put = (text: string, strong = false) => {
-            const el = document.createElement('span');
-            if (strong) el.className = 'v';
-            el.textContent = text;
-            slot.append(el);
-          };
-          put('susquehanna @ sunbury: ');
-          put(`${f.current_stage_ft} ft`, true);
-          put(' · 48h forecast: ');
-          put(`${h48.p50} ft`, true);
-          put(` (${h48.p10}–${h48.p90})`);
-          put(' · flood odds ');
-          put(maxProb < 0.005 ? '<1%' : `${Math.round(maxProb * 100)}%`, true);
-          sbyRow.hidden = false;
-          document.getElementById('live-strips')!.hidden = false;
-        } catch {
-          /* API down: row stays hidden */
-        }
-      }
-    </script>
-
     <script>
       // Odometer: fetch totals once, then animate forward at the lifetime
       // average rate. Looks live, but deliberately never exposes current