Delete useless spaces

Signed-off-by: yupengzte <yu.peng36@zte.com.cn>

docs/admin/high-availability/index.md

@@ -63,7 +63,6 @@ If you are using monit, you should also install the monit daemon (`apt-get insta
 
 On systemd systems you `systemctl enable kubelet` and `systemctl enable docker`.
 
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 ## Establishing a redundant, reliable data storage layer
 
 The central foundation of a highly available solution is a redundant, reliable storage layer.  The number one rule of high-availability is
@@ -97,7 +96,6 @@ Note that in `etcd.yaml` you should substitute the token URL you got above for `
 and you should substitute a different name (e.g. `node-1`) for `${NODE_NAME}` and the correct IP address
 for `${NODE_IP}` on each machine.
 
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 #### Validating your cluster
 
 Once you copy this into all three nodes, you should have a clustered etcd set up.  You can validate on master with
@@ -130,7 +128,6 @@ Regardless of how you choose to implement it, if you chose to use one of these o
 to each machine.  If your storage is shared between the three masters in your cluster, you should create a different directory on the storage
 for each node.  Throughout these instructions, we assume that this storage is mounted to your machine in `/var/etcd/data`
 
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 ## Replicated API Servers
 
 Once you have replicated etcd set up correctly, we will also install the apiserver using the kubelet.