Remove references for direct EA

We are enabling Azure portal experience for indirect EA users. Making these changes to make documentation applicable for indirect customers

Author: prashantsaini4

articles/cost-management-billing/toc.yml

@@ -141,7 +141,7 @@
       href: understand/mpa-overview.md
     - name: Get started in the Azure EA portal
       href: manage/ea-portal-get-started.md
-    - name: Get started in the Azure portal for direct EA
+    - name: Get started with EA billing in the Azure Portal
       href: manage/ea-direct-portal-get-started.md
     - name: Direct EA billing invoice documents
       href: manage/direct-ea-billing-invoice-documents.md
@@ -327,7 +327,7 @@
         href: manage/understand-ea-roles.md
       - name: Azure EA portal administration
         href: manage/ea-portal-administration.md
-      - name: Azure direct EA administration
+      - name: EA billing administration
         href: manage/direct-ea-administration.md
       - name: Azure EA portal administration for partners
         href: manage/ea-partner-portal-administration.md
@@ -337,7 +337,7 @@
         href: manage/ea-portal-agreements.md
       - name: Enterprise enrollment invoices
         href: manage/ea-portal-enrollment-invoices.md
-      - name: View and download direct EA usage details
+      - name: View and download EA usage details
         href: manage/direct-ea-azure-usage-charges-invoices.md
       - name: Azure EA pricing
         href: manage/ea-pricing-overview.md