bootstrap: delete link to zephyr docs

This page just got moved so the link is invalid.

I've now been hurt, so I won't trust again by updating it :). Instead,
just remove it entirely.

Signed-off-by: Marti Bolivar <marti@foundries.io>

src/west/_bootstrap/main.py

@@ -407,10 +407,6 @@ def wrap(argv):
                   file=sys.stderr)
             print(' - Run "west init -h" for additional information.',
                   file=sys.stderr)
-            print(file=sys.stderr)
-            print('For more information, see:',
-                  'https://docs.zephyrproject.org/latest/tools/west/repo-tool.html',  # noqa: E501
-                  file=sys.stderr)
             sys.exit(1)
 
     west_git_repo = os.path.join(topdir, WEST_DIR, WEST)