Clear some descriptions

lstchain/io/event_selection.py

@@ -15,6 +15,10 @@ class EventSelector(Component):
     Filter values used for event filters and list of finite parameters are
     taken as inputs and filter_events() is used on a table of events
     called in with the Component.
+
+    For event_type, we choose the sub-array trigger of 32, which is for 
+    gamma-ray event candidate, as per the latest CTA R1 Event Data Model.
+    So we add a free max value - 33, to use in the filter_events function.
     """
 
     filters = Dict(

lstchain/reco/utils.py

@@ -775,9 +775,6 @@ def get_geomagnetic_delta(zen, az, B_dec=None, B_inc=None):
     telescope zenith and azimuth pointing to get the angle between the
     geomagnetic field and the shower axis, for a single telescope.
 
-    For stereo observation, this function would be incomplete and would need
-    to be updated.
-
     If no geomagnetic parameters are provided, use default for LST-1 by
     estimating the predicted values as per
     https://www.ngdc.noaa.gov/geomag/calculators/magcalc.shtml?#igrfwmm