[Bugs] #1462 UNSP: remove ~/.sugar/debug

[Sugar Labs Bugs]

#1462: remove ~/.sugar/debug
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    Reporter:  sascha_silbe               |          Owner:  tomeu            
        Type:  task                       |         Status:  new              
    Priority:  Unspecified by Maintainer  |      Milestone:  0.88             
   Component:  sugar                      |        Version:  Git as of bugdate
    Severity:  Unspecified                |       Keywords:                   
Distribution:  Unspecified                |   Status_field:  New              
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 {{{~/.sugar/debug}}} currently gets sourced (interpreted) as a shell
 script, which by definition means using a shell to do it.
 To get debug logs of our DBus services (data store, presence service),
 we'd need to source {{{~/.sugar/debug}}} before starting dbus-launch. For
 "native" logins (not sugar-emulator) that's out of our control as dbus-
 launch is usually started by some distro script before running sugar. So
 {{{~/.sugar/debug}}} is currently of very limited use (before #1440 was
 fixed it was the same way for sugar-emulator as well).

 For the current purpose (setting the log level) easier methods exist
 (regular Sugar config mechanism, system-provided mechanisms for setting
 environment variables) that don't require sugar to use a shell and work in
 all cases. By using the Sugar config mechanism and adding a setting to the
 Control Panel we could even let "normal" users enable debug logs (they
 don't have to type magic incantations in Terminal and use an editor
 they're not comfortable with).

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Ticket URL: <http://bugs.sugarlabs.org/ticket/1462>
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