Update README.md to remove the OpenAI orm (#2156)

Author: pamelafox

README.md

@@ -76,7 +76,6 @@ The repo includes sample data so it's ready to try end to end. In this sample ap
 **IMPORTANT:** In order to deploy and run this example, you'll need:
 
 - **Azure account**. If you're new to Azure, [get an Azure account for free](https://azure.microsoft.com/free/cognitive-search/) and you'll get some free Azure credits to get started. See [guide to deploying with the free trial](docs/deploy_lowcost.md).
-- **Azure subscription with access enabled for the Azure OpenAI service**. You can request access with [this form](https://aka.ms/oaiapply). If your access request to Azure OpenAI service doesn't match the [acceptance criteria](https://learn.microsoft.com/legal/cognitive-services/openai/limited-access?context=%2Fazure%2Fcognitive-services%2Fopenai%2Fcontext%2Fcontext), you can use [OpenAI public API](https://platform.openai.com/docs/api-reference/introduction) instead. Learn [how to switch to an OpenAI instance](docs/deploy_existing.md#openaicom-openai).
 - **Azure account permissions**:
   - Your Azure account must have `Microsoft.Authorization/roleAssignments/write` permissions, such as [Role Based Access Control Administrator](https://learn.microsoft.com/azure/role-based-access-control/built-in-roles#role-based-access-control-administrator-preview), [User Access Administrator](https://learn.microsoft.com/azure/role-based-access-control/built-in-roles#user-access-administrator), or [Owner](https://learn.microsoft.com/azure/role-based-access-control/built-in-roles#owner). If you don't have subscription-level permissions, you must be granted [RBAC](https://learn.microsoft.com/azure/role-based-access-control/built-in-roles#role-based-access-control-administrator-preview) for an existing resource group and [deploy to that existing group](docs/deploy_existing.md#resource-group).
   - Your Azure account also needs `Microsoft.Resources/deployments/write` permissions on the subscription level.