cli: fix rad-push-and-pull-patches

The call to `rad sync -a` can end up with different output if the `git
push` has already announced to the network -- ending up with the nodes
already be in sync.

Instead, for consistency, leave the syncing up to the `git push` and
remove the call to `rad sync`.

Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett

radicle-cli/examples/rad-push-and-pull-patches.md

@@ -5,8 +5,6 @@ $ git push rad
 $ git checkout -b bob/1 -q
 $ git commit --allow-empty -m "Changes #1" -q
 $ git push -o patch.message="Changes" rad HEAD:refs/patches
-$ rad sync -a
-✓ Synced with 1 node(s)
 ```
 
 ``` ~alice