Since we've broken LibP2P communication with our Rendezvous nodes
somewhere after `v0.79.11` we should not enable it by defaults since it
generates errors like these:
```
failed to dial 16Uiu2...d687e4: all dials failed
failed to negotiate security protocol: protocol not supported
```
Since normal bootnodes are defined as well as a list of static nodes
there should not be a need for using Rendezvous as well.
Resolves: https://github.com/status-im/status-go/issues/2309
Signed-off-by: Jakub Sokołowski <jakub@status.im>