docs: fix to reflect network change

PR #477 uses default network, updating docs to match

Author: ukkopahis

docs/Containers/Python.md

@@ -40,14 +40,8 @@ When you select Python in the menu:
 	#   - "external:internal"
 	  volumes:
 	  - ./volumes/python/app:/usr/src/app
-	  networks:
-	  - iotstack_nw
 	```
 
-	Note:
-
-	* This service definition is for "new menu" (master branch). The only difference with "old menu" (old-menu branch) is the omission of the last two lines.
-
 ### customising your Python service definition
 
 The service definition contains a number of customisation points:
@@ -456,8 +450,6 @@ Proceed like this:
 	  #   - "external:internal"                   #   - "external:internal"
 	  volumes:                                    volumes:
 	    - ./volumes/python/app:/usr/src/app  |      - ./volumes/wishbone/app:/usr/src/app
-	  networks:                                   networks:
-	    - iotstack_nw                               - iotstack_nw
 	```
 
 	Note:

docs/Containers/WireGuard.md

@@ -67,7 +67,6 @@ Unfortunately, that service definition will not work "as is". It needs to be con
 Key points:
 
 * Everything in the `environment:` section from `SERVERURL=` down to `PEERDNS=` (inclusive) affects WireGuard's generated configurations (the QR codes). In other words, any time you change any of those values, any existing QR codes will stop working.
-* WireGuard does not need to communicate directly with other Docker containers so there is no need for it to join `iotstack_nw`.
 
 ### Step 4: Decide what to configure