remove obsolete flag that was needed for the vue.js ui

pdb-ui/src/main/java/org/lucares/pdbui/PdbController.java

@@ -67,9 +67,6 @@ public class PdbController implements HardcodedValues, PropertyKeys {
 
     private final ReentrantLock plotterLock = new ReentrantLock();
 
-    @Value("${" + PRODUCTION_MODE + ":true}")
-    private boolean modeProduction;
-
     @Value("${" + DEFAULTS_QUERY_EXAMPLES + ":}")
     private String queryExamples;
 

pdb-ui/src/main/java/org/lucares/pdbui/PropertyKeys.java

@@ -12,12 +12,6 @@ public interface PropertyKeys {
      */
     String TMP_DIR = "path.tmp";
 
-    /**
-     * Indicates whether or not this instance is running in production. This
-     * property is used to switch Vue.js into production or development mode.
-     */
-    String PRODUCTION_MODE = "mode.production";
-
     String DEFAULTS_QUERY_EXAMPLES = "defaults.query.examples";
 
     String DEFAULTS_GROUP_BY = "defaults.groupBy";