remove mentions of outdated systems and app versions

Author: leafo

developing/getting-started.md

@@ -4,9 +4,6 @@ itch is built in TypeScript and runs inside of Electron.
 
 To get started, ensure you have a modern version of [node.js](https://nodejs.org/) installed.
 
-> Linux distributions may ship outdated node.js versions
-> Use the nodesource [binary distributions](https://github.com/nodesource/distributions/) to get an up-to-date one.
-
 Then, clone the [https://github.com/itchio/itch](https://github.com/itchio/itch) repository somewhere.
 
 Install the javascript dependencies by running the following command from within the `itch` directory you've just cloned:

installing/linux/README.md

@@ -1,10 +1,5 @@
 # Installing on Linux
 
-These instructions apply to itch v25 and up.
-
-> If you have an older version of the app installed, uninstall it before
-> following those instructions.
-
 Simply head to [https://itch.io/app](https://itch.io/app) and grab the Linux installer.
 
 ## Installing
@@ -24,13 +19,6 @@ shows up in the top right corner.
 
 Clicking it allows you to restart into the new version.
 
-> The APT and YUM repositories are no longer officially supported.
->
-> [the itch installer](https://github.com/itchio/itch-setup) is open-source, and purpose-built on top of the same technology as [butler](https://github.com/itchio/butler), our diffing and patching solution.
->
-> Please open issues directly on the itch-setup repository if you
-> encounter issues or if it doesn't cater to your use-case!
-
 ## Uninstalling
 
 Run `~/.itch/itch-setup --uninstall` to uninstall itch from your system.

installing/macos.md

@@ -6,10 +6,6 @@
 > If it doesn't launch the first time - try a second time. We're looking
 > into that particular issue.
 
-Note: before v25, itch used to install in `/Applications/itch.app`. It now installs
-per-user, in `~/Applications/itch.app`. You might want to remove the former before
-(or after) installing itch v25.
-
 ### Verifying the app
 
 All our OSX binaries are signed by a Developer ID certificate to the name of [itch corp.](https://github.com/itch.io), and you can verify them by running the following command in a terminal:

installing/windows.md

@@ -44,12 +44,10 @@ Clicking it allows you to restart into the new version.
 
 ## Uninstalling
 
-itch can be uninstalled from the **Apps & Features** section of the Windows 10 settings:
+itch can be uninstalled from the **Apps & Features** section of the Windows settings:
 
 ![](/assets/win10-uninstall.png)
 
-For older Windows versions, use the Control Panel as usual.
-
 > Note: uninstalling the itch.io app does not wipe the `%APPDATA%\itch` folder, which contains all your installed games, local database, web session data and cache, and so on.
 >
 > If you really want to delete it all, you'll need to take care of that folder too.

integrating/compatibility-policy.md

@@ -45,7 +45,7 @@ But in reality:
 
 All tiers below platinum have the following inconvenients:
 
-* **No automatic upgrades**. With different uploads, there's no way for the itch app to tell _for sure_ what needs to be upgraded to what, so it just doesn't update at all.[^4]
+* **No automatic upgrades**. With different uploads, there's no way for the itch app to tell _for sure_ what needs to be upgraded to what, so it just doesn't update at all.
 * **No integrity check** - it's reinstall or nothing.
 
 However, installs still don't require additional disk space, or administrator privileges, and uninstalls are instant.
@@ -208,8 +208,6 @@ Here's a non-exhaustive list of installer creators we don't support:
 
 [^3]: There's a whole book to be written about our patching system - and it would be a good book, too! For now, let's stay humble and just mention that it routinely outperforms commercial patching solutions.
 
-[^4]: Versions of the itch.io app up to 23.x used to take guesses as to non-butler-uploads updates. It caused more problems than it solved, so that's no longer the case.
-
 [^5]: The actual sentiment is more along the lines of "everything else has significant drawbacks and no amount of GitHub comments would convince us otherwise at this point in time", but that doesn't roll off the tongue quite as easily.
 
 [^6]: The fact that malware authors love it, the amount of password-protected archives out there, the fact that at least 3 major versions are in use in the wild \(Rar2, Rar3, Rar5\), and that it reminds one about the golden age of Rare, the one from Twycross Leicestershire.