Remove old login. Fix ANSYS docs

docs/merlin6/hardware-and-software-description.md

@@ -87,11 +87,14 @@ Each blade contains a NVMe disk, where up to 300TB are dedicated to the O.S., an
 
 ### Login Nodes
 
-*One old login node* (``merlin-l-01.psi.ch``) is inherit from the previous Merlin5 cluster. Its mainly use is for running some BIO services (`cryosparc`) and for submitting jobs.
-*Two new login nodes* (``merlin-l-001.psi.ch``,``merlin-l-002.psi.ch``) with similar configuration to the Merlin6 computing nodes are available for the users. The mainly use
-is for compiling software and submitting jobs.
+Two login nodes (`merlin-l-001.psi.ch`, `merlin-l-002.psi.ch`) are available to users. They are configured similarly to the Merlin6 compute nodes and are intended primarily for software compilation, job submission, lightweight preprocessing, and visualization tasks.
 
-The connectivity is based on **ConnectX-5 EDR-100Gbps** for the new login nodes, and **ConnectIB FDR-56Gbps** for the old one.
+Each login node is equipped with an NVIDIA Quadro P2000 GPU. These GPUs are not intended for large-scale or long-running compute workloads, 
+but rather to support interactive and lightweight GPU-accelerated tasks such as OpenGL-based visualization, remote desktop sessions, 
+debugging, testing GPU-enabled applications, and validating CUDA or graphics workflows before running them at scale on the compute nodes. 
+This allows users to develop and debug GPU-aware software without consuming compute-partition resources, while still keeping heavy production workloads confined to the batch system.
+
+The connectivity is based on **ConnectX-5 EDR-100Gbps**.
 
 <table>
   <thead>
@@ -109,7 +112,7 @@ The connectivity is based on **ConnectX-5 EDR-100Gbps** for the new login nodes,
    <th scope='col' style="vertical-align:middle;text-align:center;" colspan="1">Memory</th>
    </tr>
   </thead>
-  <tbody>
+  <!--tbody>
    <tr style="vertical-align:middle;text-align:center;" ralign="center">
      <td style="vertical-align:middle;text-align:center;" rowspan="1"><b>Old</b></td>
      <td style="vertical-align:middle;text-align:center;" rowspan="1"><b>merlin-l-01</b></td>
@@ -119,7 +122,7 @@ The connectivity is based on **ConnectX-5 EDR-100Gbps** for the new login nodes,
      <td style="vertical-align:middle;text-align:center;" rowspan="1">2</td>
      <td style="vertical-align:middle;text-align:center;" rowspan="1">100GB</td>
      <td style="vertical-align:middle;text-align:center;" rowspan="1">512GB</td>
-   </tr>
+   </tr-->
    <tr style="vertical-align:middle;text-align:center;" ralign="center">
      <td style="vertical-align:middle;text-align:center;" rowspan="1"><b>New</b></td>
      <td style="vertical-align:middle;text-align:center;" rowspan="1"><b>merlin-l-00[1,2]</b></td>