#470: do not store keytables datasource anymore

Author: mmerdes

oshdb-api/src/main/java/org/heigit/ohsome/oshdb/api/db/OSHDBJdbc.java

@@ -29,7 +29,6 @@
 public class OSHDBJdbc extends OSHDBDatabase {
 
   protected final DataSource dataSource;
-  protected final DataSource keytablesSource;
   protected final TagTranslator tagTranslator;
   private boolean useMultithreading = true;
 
@@ -39,8 +38,7 @@ public OSHDBJdbc(DataSource source) {
 
   public OSHDBJdbc(DataSource source, DataSource keytables) {
     this.dataSource = source;
-    this.keytablesSource = keytables;
-    this.tagTranslator = new JdbcTagTranslator(keytablesSource);
+    this.tagTranslator = new JdbcTagTranslator(keytables);
   }
 
   @Override