revert: docs: add migration note about upgrading from < 0.30.0 (#1450)

This reverts commit 48aceb1.

This issue was fixed upstream in git-validate with the release of
version 2.2.4. AEgir 15.0.1 uses that fixed release. As we use
version ranges for dependencies, it is automatically fixed now.
Hence reverting the original commit.

CHANGELOG.md

@@ -53,19 +53,6 @@ Signed-off-by: David Dias <mail@daviddias.me>
 License: MIT
 Signed-off-by: Alan Shaw <alan@tableflip.io>
 
-* Git pre-push hook has been removed
-
-  **This only applies to developers that build IPFS from source, not for consumers**
-
-  This can cause problems during installation of npm dependencies, in case the repository
-  is not freshly cloned. Prior to 0.30.0 a pre-push hook has been set up to verify
-  changes before sending them to a remote repository. Due to the removal, existing
-  installations will have dead symlinks that cause `npm install` to fail.
-
-  The migration path is to remove the `pre-hook` file/symlink inside `.git/hooks` of
-  your clone.
-
-  [Read this issue](https://github.com/ipfs/js-ipfs/issues/1444) for more information.
 
 
 <a name="0.29.3"></a>

README.md

@@ -42,11 +42,6 @@ You can check the development status at the [Waffle Board](https://waffle.io/ipf
 
 [**`Weekly Core Dev Calls`**](https://github.com/ipfs/pm/issues/650)
 
-
-### Upgrading from < 0.30.0
-
-If you're upgrading from < 0.30.0 you might run into errors when installing dependencies due to non-existing git hooks. For fixes, please refer to the [changelog](https://github.com/ipfs/js-ipfs/blob/master/CHANGELOG.md#breaking-changes).
-
 ## Tech Lead
 
 [David Dias](https://github.com/diasdavid)
@@ -365,10 +360,10 @@ The core API is grouped into several areas:
   - [`ipfs.files.addPullStream([options])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#filesaddpullstream)
   - [`ipfs.files.addReadableStream([options])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#filesaddreadablestream)
   - [`ipfs.files.cat(ipfsPath, [options], [callback])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#filescat). Alias to `ipfs.cat`.
-  - [`ipfs.files.catPullStream(ipfsPath, [options])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#filescatpullstream)
+  - [`ipfs.files.catPullStream(ipfsPath, [options])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#filescatpullstream)  
   - [`ipfs.files.catReadableStream(ipfsPath, [options])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#filescatreadablestream)
   - [`ipfs.files.get(ipfsPath, [options], [callback])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#filesget). Alias to `ipfs.get`.
-  - [`ipfs.files.getPullStream(ipfsPath, [options])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#filesgetpullstream)
+  - [`ipfs.files.getPullStream(ipfsPath, [options])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#filesgetpullstream)  
   - [`ipfs.files.getReadableStream(ipfsPath, [options])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#filesgetreadablestream)
   - [`ipfs.ls(ipfsPath, [callback])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#ls)
   - [`ipfs.lsPullStream(ipfsPath)`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/FILES.md#lspullstream)