Revise affiliation and remove support logos

Updated the affiliation of Mihai Gabriel Constantin and removed support logos.

Author: cmihaigabriel

_editions/2026.md

@@ -25,18 +25,6 @@ Signup for MediaEval 2026 opens in January.
 
 
 ##### The MediaEval Coordination Committee (2026): 
-* Mihai Gabriel Constantin, University Politehnica of Bucharest, Romania
+* Mihai Gabriel Constantin, National University of Science and Technology Politehnica Bucharest, Romania
 * Steven Hicks, SimulaMet, Norway
 * Martha Larson, Radboud University, Netherlands
-
-##### MediaEval 2026 is supported by:
-
-<a href="https://www.sigmm.org/">
- <img src="https://multimediaeval.github.io/editions/2020/docs/sigmmlogo.gif" width=150/>
-</a><br>
-<a href="https://www.adaptcentre.ie/">
-  <img src="https://multimediaeval.github.io/editions/2025/docs/adaptlogo.jpg" width=150/>
-</a><br>
-<a href="https://aicode-project.eu/">
-   <img src="https://multimediaeval.github.io/editions/2025/docs/ai-code-1.png" width=150/>
-</a>