Code_aster: Remove obsolete Fluid participant section from config.comm

It is configured in Fluid/system/preciceDict

Author: MakisH

CHT/flow-over-plate/buoyantSimpleFoam-aster/config.comm

@@ -1,17 +1,7 @@
 settings = \
 {'base-path': tutorial_root,
  'couplings': [['Solid-Interface', 'Fluid-Interface']],
- 'participants': {'Fluid': {'directory': 'Fluid',
-                            'domain-decomposed': False,
-                            'interfaces': [{'mesh': 'Fluid-Interface',
-                                            'name': 'Fluid-Interface',
-                                            'patches': ['interface'],
-                                            'read-data': ['Sink-Temperature-Solid',
-                                                          'Heat-Transfer-Coefficient-Solid'],
-                                            'write-data': ['Sink-Temperature-Fluid',
-                                                           'Heat-Transfer-Coefficient-Fluid']}],
-                            'solver': 'OpenFOAM'},
-                  'Solid': {'directory': 'Solid',
+ 'participants': {'Solid': {'directory': 'Solid',
                             'domain-decomposed': False,
                             'interfaces': [{'material-id': 0,
                                             'name': 'Solid-Interface',