Removed a duplicate paragraph about disk mirroring

Author: darshan-nagaraj

modules/installation-special-config-storage.adoc

@@ -85,8 +85,6 @@ If you require both TPM v2 and Tang for decryption, the value of the `threshold`
 
 During {product-title} installation on control plane and worker nodes, you can enable mirroring of the boot and other disks to two or more redundant storage devices. A node continues to function after storage device failure as long as one device remains available.
 
-During {product-title} installation on control plane and compute nodes, you can enable mirroring of the boot disk to two or more redundant storage devices. A node continues to function after storage device failure as long as one device remains available.
-
 Mirroring does not support replacement of a failed disk. To restore the mirror to a pristine, non-degraded state, reprovision the node.
 
 [NOTE]