docs: remove reference to being official (#28858)

Author: holiman

README.md

@@ -1,6 +1,6 @@
 ## Go Ethereum
 
-Official Golang execution layer implementation of the Ethereum protocol.
+Golang execution layer implementation of the Ethereum protocol.
 
 [![API Reference](
 https://pkg.go.dev/badge/github.com/ethereum/go-ethereum

cmd/geth/main.go

@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
 
-// geth is the official command-line client for Ethereum.
+// geth is a command-line client for Ethereum.
 package main
 
 import (