Change snap confinement to classic

	Fixes: #2523

	Pending discussion in
	https://forum.snapcraft.io/t/fluxctl-personal-files-was-fluxctl-snap-wants-to-be-classic/11073/27

snap/snapcraft.yaml

@@ -3,7 +3,7 @@ summary: fluxctl talks to Flux and helps you deploy your code
 description: |
   fluxctl talks to your Flux instance and exposes all its
   functionality to an easy to use command line interface.
-confinement: strict
+confinement: classic
 adopt-info: fluxctl
 base: core18
 
@@ -54,18 +54,9 @@ parts:
       bin/fluxctl: bin/fluxctl.real
     after: [launcher]
 
-plugs:
-  kube-config:
-    interface: personal-files
-    read:
-    - $HOME/.kube
-    - $HOME/.minikube
-    - $HOME/.config/k3d  # hard-coded $XDG_CONFIG_HOME for the common case
-
 apps:
   fluxctl:
     command: bin/fluxctl-launch
     plugs:
-    - kube-config
     - network
     - network-bind