Drop unused table presence (#14825)

Author: dklimpel

changelog.d/14825.misc

@@ -0,0 +1 @@
+Drop unused table `presence`.

scripts-dev/database-save.sh

@@ -11,6 +11,5 @@
 sqlite3 "$1" <<'EOF' >table-save.sql
 .dump users
 .dump access_tokens
-.dump presence
 .dump profiles
 EOF

synapse/storage/schema/main/delta/73/25drop_presence.sql

@@ -0,0 +1,17 @@
+/* Copyright 2023 The Matrix.org Foundation C.I.C
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+-- this table is unused
+DROP TABLE presence;