Add no-op image_ready enhancement

satpy/composites/__init__.py

@@ -721,7 +721,7 @@ def __init__(self, name, lim_low=85., lim_high=88., day_night="day_night", inclu
         self.day_night = day_night
         self.include_alpha = include_alpha
         self._has_sza = False
-        super(DayNightCompositor, self).__init__(name, **kwargs)
+        super().__init__(name, **kwargs)
 
     def __call__(
             self,

satpy/enhancements/__init__.py

@@ -653,3 +653,8 @@
 
     output = da.dot(img_data.T, ccm.T)
     return output.T
+
+
+def no_op(img):
+    """Do not do anything to the image."""
+    return img.data

satpy/etc/enhancements/generic.yaml

@@ -1285,3 +1285,9 @@ enhancements:
   imager_with_lightning:
     standard_name: imager_with_lightning
     operations: []
+
+  image_ready:
+    standard_name: image_ready
+    operations:
+      - name: no_op
+        method: !!python/name:satpy.enhancements.no_op