remove old installation instructions

Author: stemangiola

vignettes/Session_2_Tidy_spatial_analyses.Rmd

@@ -57,25 +57,6 @@ style="width:100%; height:600px;"
 frameborder="0">
 </iframe>
 
-### Installation
-
-let's make sure we get the latest packages available on github
-
-```{r, eval=FALSE}
-
-# In May 2025, the following packages should be installed from github repositories, to use the latest features. In case you have them pre installed, run the following command
-BiocManager::install(c("lmweber/ggspavis", 
-                       "stemangiola/tidySummarizedExperiment", 
-                        "stemangiola/tidySingleCellExperiment", 
-                       "william-hutchison/tidySpatialExperiment", 
-                       "stemangiola/tidybulk", 
-                       "stemangiola/tidygate"), 
-                     update = FALSE)
-
-```
-
-**Important:** Please restart your R session after installation to ensure the updated packages are loaded correctly.
-
 Let's load the libraries needed for this session
 
 ```{r, message = FALSE}