remove cloud encryption card

"Encryption with 7zip" is dangerously misleading and we have alternative cards
that describe reasonable other ways to get the files encrypted and uploaded
(cryptomator, or the exchange channel cards that actually describe valid PGP
workflows). I think it's OK to just remove this. Comments welcome.

external/integrity/encryption/cloud/cloud.md

----
-layout: page
-permalink: /external/integrity/encryption/cloud/
-shortcut: integrity:encryption:cloud
-redirect_from:
-  - /cards/integrity:encryption:cloud
-  - /external/cards/integrity:encryption:cloud
-  - /integrity/encryption/cloud
-  - /external/external/integrity/encryption/cloud/
----
-
-# Data upload to cloud
-
-Data encryption and hash-check for uploading to UL-LCSB onedrive or owncloud from Windows.
-
-| Requirements | Restrictions |
-| ------ | ------ |
-| Windows 8 or newer (recommended Windows 10) | Recommended for data size less than 100 GB |
-| RAM 2GB (recommended 4GB) | If transfer through Aspera is not possible |
-| Enough free disc space (data will be duplicated for encryption) | Larger data will take more time to encrypt |
-| Administrative rights to install software |  |
-| Web browser (Firefox, Edge or Chrome) |  |
-
-## Install `7zip` for encryption
-
-Download and install `7zip` from [here](https://www.7-zip.org/)
-
-## Install tool for MD5 checksum calculation
-
-1. Search Microsoft Store for `Simple Checksum Calculator` or go to this [link](https://www.microsoft.com/en-us/p/simple-checksum-calculator/9nblggh5l6t9?activetab=pivot:overviewtab)
-2. Install `Simple Checksum Calculator`
-
-
-## Encrypt your data with `7zip`
-
-1. Right click on the folder to encrypt > 7zip > Add to archive
-2. Select following values:
-   - Archive format: `zip`
-   - Compression: `store`
-   - Check `Show Password` box
-   - Encryption: `AES256`
-3. Enter a password and make a copy of the encryption password :key:
-4. Click save to save the encrypted zip file
-
-![](media/7zip-encryption-windows.mp4?width=400)
-
-## Calculate the MD5 checksum with `Simple Checksum Calculator`
-
-1. Open `Simple Checksum Calculator` from the start-menu
-2. Select `File` tab from the top menu
-3. Click on the file icon box in the left panel and load the encrypted zip file
-4. Make a copy of the MD5 checksum key :label:
-
-![](media/Get_MD5_checksum_windows.mp4)
-
-## Data upload
-
-1. Open the `OneDrive` or `ownCloud` URL link that you have received from UL-LCSB contact
-2. Upload the encrypted zip file
-3. After the upload completion, open [UNILU privatebin](https://hpc.uni.lu/privatebin/)
-4. Paste the **encryption password :key:** and **MD5 checksum :label:** in the Editor box and press send
-5. Copy the privatebin URL and send it your UL-LCSB contact through email
\ No newline at end of file