Removed 'base_url' field.

Signed-off-by: Cristiano Urban <cristiano.urban@inaf.it>

00-tables.sql

@@ -20,7 +20,6 @@ CREATE TABLE storage (
     storage_id        SMALLSERIAL   NOT NULL,
     storage_type      StorageType   NOT NULL,
     base_path         VARCHAR       default NULL,
-    base_url          VARCHAR       default NULL,
     hostname          VARCHAR       NOT NULL,
     PRIMARY KEY (storage_id)
 );