OSDOCS-13967: remove mention of RHEL workers

Author: jldohmann

modules/rhcos-about.adoc

@@ -8,7 +8,7 @@
 
 {op-system-first} represents the next generation of single-purpose container operating system technology by providing the quality standards of {op-system-base-full} with automated, remote upgrade features.
 
-{op-system} is supported only as a component of {product-title} {product-version} for all {product-title} machines. {op-system} is the only supported operating system for {product-title} control plane, or master, machines. While {op-system} is the default operating system for all cluster machines, you can create compute machines, which are also known as worker machines, that use {op-system-base} as their operating system. There are two general ways {op-system} is deployed in {product-title} {product-version}:
+{op-system} is supported only as a component of {product-title} {product-version} for all {product-title} machines. {op-system} is the only supported operating system for all node types in {product-title}. {op-system} is deployed in {product-title} {product-version} in two general ways:
 
 * If you install your cluster on infrastructure that the installation program provisions, {op-system} images are downloaded to the target platform during installation. Suitable Ignition config files, which control the {op-system} configuration, are also downloaded and used to deploy the machines.