scripts: Remove 'max-silent-time' from the default options.

Fixes <http://bugs.gnu.org/27157>.

Having a finite default `max-silent-time' value for scripts such as 'guix
environment' could lead to timeouts when building subtitutes; this was
undesirable.

This change also fixes client behavior to match the documentation, which
is that by default the daemon's settings are honored.

* guix/scripts/archive.scm (%default-options): Remove max-silent-time entry.
* guix/scripts/copy.scm (%default-options): Likewise.
* guix/scripts/environment.scm (%default-options): Likewise.
* guix/scripts/pack.scm (%default-options): Likewise.
* guix/scripts/package.scm (%default-options): Likewise.
* guix/scripts/pull.scm (%default-options): Likewise.
* guix/scripts/system.scm (%default-options): Likewise.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

guix/scripts/archive.scm

@@ -54,7 +54,6 @@
   `((system . ,(%current-system))
     (substitutes? . #t)
     (graft? . #t)
-    (max-silent-time . 3600)
     (verbosity . 0)))
 
 (define (show-help)

guix/scripts/copy.scm

@@ -151,7 +151,6 @@ Copy ITEMS to or from the specified host over SSH.\n"))
   `((system . ,(%current-system))
     (substitutes? . #t)
     (graft? . #t)
-    (max-silent-time . 3600)
     (verbosity . 0)))
 
 

guix/scripts/environment.scm

@@ -179,7 +179,6 @@ COMMAND or an interactive shell in that environment.\n"))
   `((system . ,(%current-system))
     (substitutes? . #t)
     (graft? . #t)
-    (max-silent-time . 3600)
     (verbosity . 0)))
 
 (define (tag-package-arg opts arg)

guix/scripts/pack.scm

@@ -263,7 +263,6 @@ the image."
     (system . ,(%current-system))
     (substitutes? . #t)
     (graft? . #t)
-    (max-silent-time . 3600)
     (verbosity . 0)
     (symlinks . ())
     (compressor . ,(first %compressors))))

guix/scripts/package.scm

@@ -377,8 +377,7 @@ ENTRIES, a list of manifest entries, in the context of PROFILE."
 
 (define %default-options
   ;; Alist of default option values.
-  `((max-silent-time . 3600)
-    (verbosity . 0)
+  `((verbosity . 0)
     (graft? . #t)
     (substitutes? . #t)))
 

guix/scripts/pull.scm

@@ -96,7 +96,6 @@ Install it by running:
     (system . ,(%current-system))
     (substitutes? . #t)
     (graft? . #t)
-    (max-silent-time . 3600)
     (verbosity . 0)))
 
 (define (show-help)

guix/scripts/system.scm

@@ -864,7 +864,6 @@ Some ACTIONS support additional ARGS.\n"))
     (substitutes? . #t)
     (graft? . #t)
     (build-hook? . #t)
-    (max-silent-time . 3600)
     (verbosity . 0)
     (file-system-type . "ext4")
     (image-size . guess)