Update Symposium_SIESTA_2025.md

Author: arnodelorme

workshops/Symposium_SIESTA_2025.md

@@ -20,10 +20,6 @@ Location and date
 -------
 June 30th, 2025, Toulouse CerCo laboratory, [Baudot building, first floor conference room (not ground floor)](https://cerco.cnrs.fr/en/visit-us/)
 
-Online. https://univ-tlse3-fr.zoom.us/j/94778485164?pwd=Fs793R6zZWptarumbGhCH4i0r47wdT.1
-Meeting ID: 947 7848 5164
-Code: 585617
-
 Program
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 10:00 -- **Isabelle Berry** -- Opening statements