Reading hazard files in .mat format is not supported

[rabinatwayana]

Describe the bug
When trying to run the eca_san_salvador application notebooks, reading hazard using "from_mat" gives an error.

To Reproduce
Steps to reproduce the behavior/error:

1. Running any of the notebook

Code example:

from climada.hazard import Hazard

HAZ_FILE = "Salvador_hazard_FL_2015.mat"

haz_2015 = Hazard.from_mat(HAZ_FILE)

Expected behavior
climada.hazard.io - INFO - Reading Salvador_hazard_FL_2015.mat

Screenshots

Climada Version: 6.0.1

System Information (please complete the following information):

• Operating system and version: macOS 14.3.1
• Python version: 3.11.13
  (to obtain this information execute > import sys >print(sys.version))

Additional context
Add any other context about the problem here.

[chahank]

Thanks for raising this point. We removed the reading of old matlab files with version 5.0.0. Users with old legacy files can use version 4 to read the files and convert them to .hdf5.

Thank you for updating the san salvadore script with this approach in #1086.