Remove Cristian Sandu from active research

active_research.md

@@ -16,7 +16,6 @@
 | Simon Dittrich     | Automated Simulation of Hierarchical Cache Coherence for CXL                                          | MA   | Anatole Lefort                         | 15.03.2024 | 15.09.2024 |
 | Francisco Kusch    | CompTN: A Compiler Infrastructure for High-Performance Tensor Network Computing                       | BA   | Nathaniel Tornow, Oğuzcan Kırmemiş     | 28.05.2024 | 28.09.2024 |
 | Luca Mathias       | Analysis and Optimization of I/O Stack of Confidential Virtual Machines                               | BA   | Masanori Misono                        | 17.06.2024 | 17.10.2024 |
-| Cristian Sandu     | Hardware assisted memory safety for databases                                                         | MA   | Ilya Meignan--Masson                   | 15.03.2024 | 28.10.2024 |
 | Alexander Schindler| Evaluating the performance impact of privilege levels of Confidential Virtual Machines                | MA   | Patrick Sabanic                        | 15.11.2023 | 15.11.2024 |
 | Milen Vitanov      | Serverless Data-Processing in Unikernels using eBPF                                                   | MA   | Masanori Misono, Ilya Meignan--Masson  | 01.06.2024 | 01.12.2024 |
 | Marcin Praski      | Real-time & parallel task scheduling for Quantum Computing                                            | MA   | Emmanouil Giortamis                    | 15.06.2024 | 15.12.2024 |