Update scale-requirements.md

Author: abhilashaagarwala

AKS-Hybrid/scale-requirements.md

@@ -42,7 +42,6 @@ This article describes the maximum and minimum supported scale count for AKS on
 | System Role                     | VM Size                                | Memory, CPU          |
 |---------------------------------|----------------------------------------|----------------------|
 | AKS Arc control plane nodes  | Standard_A4_v2                         | 8-GB memory, 4 vcpu  |
-| AKS Arc HA Proxy VM          | Standard_A4_v2. (This size is fixed and can't be changed) | 8-GB memory, 4 vcpu  |
 | AKS Arc Linux worker node    | Standard_K8S3_v1                       | 6-GB memory, 4 vcpu  |
 | AKS Arc Windows worker node  | Standard_K8S3_v1                       | 6-GB memory, 4 vcpu  |