Revert "Add clear GPS endpoint + frontend button"

This reverts commit ca77a29d7d.

static/index.html

@@ -1249,7 +1249,6 @@
       </div>
       <div style="display:flex;gap:8px;margin-bottom:10px;">
         <button class="btn btn-outline btn-sm" onclick="editAsset()" style="flex:1;">✏️ Edit</button>
-        <button class="btn btn-outline btn-sm" id="detailClearGpsBtn" onclick="clearAssetGps()" style="flex:1;display:none;">📍 Clear GPS</button>
         <button class="btn btn-danger btn-sm" onclick="deleteAsset()" style="flex:1;">🗑️ Delete</button>
       </div>
     </div>
@@ -3606,14 +3605,6 @@
           navBtn.style.display = 'none';
         }
 
-        // Clear GPS button — show when asset has GPS
-        const clearGpsBtn = document.getElementById('detailClearGpsBtn');
-        if (a.latitude != null && a.longitude != null) {
-          clearGpsBtn.style.display = '';
-        } else {
-          clearGpsBtn.style.display = 'none';
-        }
-
         // Keys + Badges
         const keys = a.keys || [];
         const badges = a.badges || (Array.isArray(a.badge_names) ? a.badge_names : []);
@@ -4005,24 +3996,6 @@
       }
     }
 
-    // ── Clear GPS ──────────────────────────────────────────────────────────
-    async function clearAssetGps() {
-      if (!AppState.currentAssetId) return;
-      const confirmed = await showModal(
-        'Clear GPS Data',
-        'Remove GPS coordinates from this asset?',
-        'Clear GPS'
-      );
-      if (!confirmed) return;
-      try {
-        await api('/api/assets/' + AppState.currentAssetId + '/gps', { method: 'DELETE' });
-        showToast('GPS data cleared');
-        viewAsset(AppState.currentAssetId);
-      } catch (e) {
-        showToast(e.message, true);
-      }
-    }
-
     // ── Delete ────────────────────────────────────────────────────────────
     async function deleteAsset() {
       if (!AppState.currentAssetId) return;