Drop explicit anchor on Billing Period heading per review

Author: gregolsky

cloud/cloud-pricing-payment-billing.mdx

@@ -147,7 +147,7 @@ Approach our Support personnel to use wire transfer or purchase order.
 Your Portal's [Billing & Costs tab](../cloud/portal/cloud-portal-billing-tab.mdx) summarizes your 
 outstanding charges and past invoices. Additional data you can see there includes Daily cost, Total 
 cost, and the expected charge at the end of this month.  
-#### Billing Period {#billing-period}
+#### Billing Period
 
 Each billing period runs from the **26th of one calendar month** to the **25th of the following month**.  
 Your account is charged on the **27th** — two days after the period closes.