fix: remove exp RPC API namespace flag from nimbus-eth1 configuration (#767)

status-im/nimbus-eth1#2635

Author: tersec

src/el/nimbus-eth1/nimbus_launcher.star

@@ -189,9 +189,9 @@ def get_config(
         "--http-port={0}".format(WS_RPC_PORT_NUM),
         "--http-address=0.0.0.0",
         "--rpc",
-        "--rpc-api=eth,debug,exp",
+        "--rpc-api=eth,debug",
         "--ws",
-        "--ws-api=eth,debug,exp",
+        "--ws-api=eth,debug",
         "--engine-api",
         "--engine-api-address=0.0.0.0",
         "--engine-api-port={0}".format(ENGINE_RPC_PORT_NUM),