Do not fight with RW rootfs, it just ain't worth it

Change-Id: I9aae83ae1191258cd1036404d8931ffdc6cbc975
diff --git a/files/nodepool/nodepool.yaml b/files/nodepool/nodepool.yaml
index 6571c9c..4a0e68e 100644
--- a/files/nodepool/nodepool.yaml
+++ b/files/nodepool/nodepool.yaml
@@ -28,7 +28,6 @@
           - name: f29
             username: ci
             path: /containers/f29
-            rw-overlay: true
       - name: ci-f29-potemkin06-vm.vesnicky.cesnet.cz
         host-key: '{{ lookup("file", "../ansible-cesnet-secrets/nodepool/ci-f29-potemkin06-vm.pub") | trim }}'
         max-servers: 1
@@ -36,7 +35,6 @@
           - name: f29
             username: ci
             path: /containers/f29
-            rw-overlay: true
       - name: ci-f29-potemkin07-vm.vesnicky.cesnet.cz
         host-key: '{{ lookup("file", "../ansible-cesnet-secrets/nodepool/ci-f29-potemkin07-vm.pub") | trim }}'
         max-servers: 1
@@ -44,7 +42,6 @@
           - name: f29
             username: ci
             path: /containers/f29
-            rw-overlay: true
       - name: ci-f29-potemkin08-vm.vesnicky.cesnet.cz
         host-key: '{{ lookup("file", "../ansible-cesnet-secrets/nodepool/ci-f29-potemkin08-vm.pub") | trim }}'
         max-servers: 1
@@ -52,7 +49,6 @@
           - name: f29
             username: ci
             path: /containers/f29
-            rw-overlay: true
 
   - name: metacloud
     driver: static