[Wd] Remove ability to select Data storage

Previously, there were 2 options for saving a document in WD: locally and in a remote database. After removing MySQL support, there is exactly one option to save - locally - without the ability to change it.

It is proposed to remove the "Data storage" combo box with exactly one item "Local file system".

Scenario:

1. Open the WD ("Run or Create Workflow" on the "Start Page").
   The "Choose Output Directory" dialog may appear. Set any directory and click "OK".
   Finally the WD window appeared.
2. Add any element from the "Elements"->"Data Writers" category to the Scene. For example, "Write Alignment" (drag it from the Palette to the Scene).
3. Select the newly added element on the Scene by clicking on it.
   The "Parameters" table appears in the Property Editor.
4. Double-click on the "Local file system" cell of the "Parameters" table.
   Current state: there is only one item in the list, which doesn't make sense.
   Expected state: no single-item combo box at all. An output is always saved locally without "asking" the user. All workflows used in v50 must open without crashes, assertions, SAFE_POINTs and task errors (a warning is acceptable). Check opening from a file, from the Samples, from the Dashboard; check the work with Wizards and in ugenecl.