doc: remove section on hiring

doc/src/SUMMARY.md

@@ -30,7 +30,6 @@
 
 - [Development](dev/dev.md)
   - [Contribute](dev/contrib/contrib.md)
-    - [Hiring](dev/contrib/hiring.md)
     - [Using Tor](dev/contrib/tor.md)
   - [Learn](dev/learn.md)
   - [API Rustdoc](dev/rustdoc.md)

doc/src/dev/contrib/hiring.md

@@ -1,5 +1,7 @@
 # Hiring Process
 
+NEW HIRES FOR DARKFI ARE FROZEN
+
 Follow this guide to work on DarkFi and get paid.
 
 If you're not a dev, see the [learn] section. We offer mentoring.