Revert "trigger on_change handler for inital value"

This reverts commit 7450e2b62601e36ff1517fd7f239279f53bb64a9.

nicegui/elements/value_element.py

@@ -19,8 +19,6 @@ class ValueElement(Element):
         self.change_handler = on_change
         self.value = value
         self.bind_value_to(self.view, 'value', forward=self.value_to_view)
-        if value:
-            self.handle_change({'value': value})
 
     def value_to_view(self, value):
         return value