Simplify osmdata_t class

Remove some functions and inline code.

src/osmdata.cpp

@@ -432,10 +432,16 @@ void osmdata_t::process_dependents()
     proc.process_relations_stage1c(std::move(rels_pending_tracker));
 }
 
-void osmdata_t::reprocess_marked() const { m_output->reprocess_marked(); }
-
-void osmdata_t::postprocess_database() const
+void osmdata_t::stop()
 {
+    if (m_append) {
+        process_dependents();
+    }
+
+    // Run stage 2 processing: Reprocess objects marked in stage 1 (if any).
+    m_output->reprocess_marked();
+
+    // Run postprocessing on database: Clustering and index creation.
     m_output->free_middle_references();
 
     if (m_droptemp) {
@@ -458,14 +464,3 @@ void osmdata_t::postprocess_database() const
     m_mid->wait();
     m_output->wait();
 }
-
-void osmdata_t::stop()
-{
-    if (m_append) {
-        process_dependents();
-    }
-
-    reprocess_marked();
-
-    postprocess_database();
-}

src/osmdata.hpp

@@ -76,16 +76,6 @@ class osmdata_t : public osmium::handler::Handler
      */
     void process_dependents();
 
-    /**
-     * Run stage 2 processing: Reprocess objects marked in stage 1 (if any).
-     */
-    void reprocess_marked() const;
-
-    /**
-     * Run postprocessing on database: Clustering and index creation.
-     */
-    void postprocess_database() const;
-
     /**
      * In append mode all new and changed nodes will be added to this. After
      * all nodes are read this is used to figure out which parent ways and