esp.4: Remove references to Sun devices

Support has been removed in 58aa35d429
and r357455 respectively.

share/man/man4/esp.4

@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd March 10, 2020
+.Dd December 26, 2020
 .Dt ESP 4
 .Os
 .Sh NAME
@@ -71,10 +71,6 @@ driver include:
 .Pp
 .Bl -bullet -compact
 .It
-Sun ESP family
-.It
-Sun FAS family
-.It
 Tekram DC390
 .It
 Tekram DC390T
@@ -86,7 +82,6 @@ Tekram DC390T
 .Xr intro 4 ,
 .Xr pci 4 ,
 .Xr sa 4 ,
-.Xr sbus 4 ,
 .Xr scsi 4 ,
 .Xr camcontrol 8
 .Sh HISTORY