docs: Remove redundant CRS enable env var (#1274)

**What problem does this PR solve?**:
This is now GA and so the env var is not required.

**Which issue(s) this PR fixes**:
Fixes #

**How Has This Been Tested?**:
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Author: jimmidyson

docs/content/getting-started/deployment/via-clusterctl.md

@@ -22,7 +22,6 @@ configuration values blank as we will specify these when creating clusters:
 ```shell
 env CLUSTER_TOPOLOGY=true \
     EXP_RUNTIME_SDK=true  \
-    EXP_CLUSTER_RESOURCE_SET=true  \
     NUTANIX_ENDPOINT= NUTANIX_PASSWORD= NUTANIX_USER=  \
     AWS_B64ENCODED_CREDENTIALS=  \
     clusterctl init \

docs/content/getting-started/deployment/via-helm.md

@@ -10,7 +10,6 @@ providers to our management cluster via `clusterctl`:
 ```shell
 env CLUSTER_TOPOLOGY=true \
     EXP_RUNTIME_SDK=true  \
-    EXP_CLUSTER_RESOURCE_SET=true  \
     NUTANIX_ENDPOINT= NUTANIX_PASSWORD= NUTANIX_USER=  \
     AWS_B64ENCODED_CREDENTIALS=  \
     clusterctl init \