Remove empty loc group special case

Some non-empty loc groups are also unreachable, so I think this was
quite deceptive - e.g. on some OSRS revisions, we'll probably never hit
100% of the keys even if we exclude empty loc groups.

We can include the empty loc flag in the list of missing keys on the
per-cache pages instead.

Signed-off-by: Graham <gpe@openrs2.org>

archive/src/main/resources/org/openrs2/archive/V1__init.sql

@@ -175,7 +175,7 @@ SELECT
    COUNT(*),
    COUNT(g.container_id),
    COUNT(*) FILTER (WHERE c.encrypted),
-   COUNT(*) FILTER (WHERE c.key_id IS NOT NULL OR (c.empty_loc IS NOT NULL AND c.empty_loc))
+   COUNT(*) FILTER (WHERE c.key_id IS NOT NULL)
 FROM master_index_valid_indexes v
 JOIN index_groups ig ON ig.container_id = v.container_id
 LEFT JOIN groups g ON g.archive_id = v.archive_id AND g.group_id = ig.group_id AND (

archive/src/main/resources/org/openrs2/archive/templates/caches/index.html

@@ -18,7 +18,7 @@
 							<th>Name</th>
 							<th>Indexes</th>
 							<th>Groups</th>
-							<th>Keys<sup><a href="#empty-locs">1</a></sup></th>
+							<th>Keys</th>
 							<th>Links</th>
 						</tr>
 					</thead>
@@ -62,18 +62,6 @@
 					</tbody>
 				</table>
 			</div>
-			<p>
-				<sup id="empty-locs">1</sup> Map squares in the middle of the
-				sea are unreachable by normal players, making it impossible to
-				obtain the keys for their loc groups. However, the loc groups
-				for these map squares are empty. As XTEA does not hide the
-				length of the compressed data, this service infers which
-				encrypted loc groups are empty and includes them in the number
-				of valid keys, regardless of whether the key is known or not.
-				After downloading a cache from this service, a cache editor may
-				be used to replace the empty encrypted loc groups with
-				unencrypted replacements.
-			</p>
 		</main>
 	</body>
 </html>

archive/src/main/resources/org/openrs2/archive/templates/caches/show.html

@@ -46,7 +46,7 @@
 					</td>
 				</tr>
 				<tr class="thead-dark">
-					<th>Keys<sup><a href="/caches#empty-locs">1</a></sup></th>
+					<th>Keys</th>
 					<td th:class="${cache.groupStats}? (${cache.groupStats.allKeysValid}? 'table-success' : 'table-warning')"
 					    th:text="${cache.groupStats}? ${#numbers.formatInteger(cache.groupStats.validKeys, 1, 'COMMA')} + ' / ' + ${#numbers.formatInteger(cache.groupStats.keys, 1, 'COMMA')} + ' (' + ${#numbers.formatPercent(cache.groupStats.validKeysFraction, 1, 2)} + ')' : 'Calculating...'">
 						Calculating...