v2v: Remove unused and unimplemented Linux.install function.

This function did 'assert false' and was also never called
from anywhere else.  Delete it.

v2v/linux.ml

@@ -97,9 +97,6 @@ and augeas_debug_errors g =
   with
     Guestfs.Error msg -> eprintf "%s: augeas: %s (ignored)\n" prog msg
 
-let install g inspect packages =
-  assert false
-
 let remove g inspect packages =
   if packages <> [] then (
     let package_format = inspect.i_package_format in

v2v/linux.mli

@@ -24,10 +24,6 @@ val augeas_reload : Guestfs.guestfs -> unit
     provide additional debugging information about parsing problems
     that augeas found. *)
 
-val install : Guestfs.guestfs -> Types.inspect -> string list -> unit
-(** Install package(s) from the list in the guest (or ensure they are
-    installed). *)
-
 val remove : Guestfs.guestfs -> Types.inspect -> string list -> unit
 (** Uninstall package(s). *)