DAQ: sample setter now clears manual sample. removed sample_clear. Manual sample must still be unmounted by hand.

gui/src/aaregui/threads/daq_worker.py

@@ -336,10 +336,6 @@ class DAQWorker(QObject):
     def sample_manual(self, s: SampleShortInfo):
         self.generic_post(f"sample/manual", s.model_dump_json())
 
-    @Slot()
-    def sample_clear(self):
-        self.generic_post("sample/clear")
-
     @Slot()
     def cancel(self):
         self.generic_post("scan/cancel")