Remove link

Author: gberaudo

src/apps/survey/README.md

@@ -11,5 +11,3 @@ This application allows to:
 The application is customizable: it works with any backend and any structure of the form.
 
 Demo: https://geoblocks.github.io/ngv/src/apps/survey/index.html
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-Conference talk: https://talks.osgeo.org/foss4g-europe-2025/talk/review/CKHZL77YWEP3ZWYQ79BTBLWU3KDF3UXR