Libraries: Fix -Wunreachable-code warnings from clang

Author: https://github.com/nico
Commit: b8dc3661ac
Pull-request: https://github.com/SerenityOS/serenity/pull/10399

Userland/Libraries/LibSQL/Database.cpp

@@ -163,7 +163,6 @@ bool Database::update(Row& tuple)
     return m_serializer.serialize_and_write<Tuple>(tuple, tuple.pointer());
 
     // TODO update indexes defined on table.
-    return true;
 }
 
 }