Fix removing first certificate in certs-from-mozilla.py (#8907)

.pem list has no headers, that operation removes a real certificate.

Author: ilmanowar

libraries/ESP8266WiFi/examples/BearSSL_CertStore/certs-from-mozilla.py

@@ -47,7 +47,6 @@
         if item.startswith("'-----BEGIN CERTIFICATE-----"):
             pems.append(item)
 del names[0] # Remove headers
-del pems[0] # Remove headers
 
 # Try and make ./data, skip if present
 try: