[Buildbot] #2653: Remove old scheduler methods

[Buildbot trac]

#2653: Remove old scheduler methods
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Reporter:  dustin  |       Owner:
    Type:  task    |      Status:  new
Priority:  minor   |   Milestone:  0.9.+
 Version:          |  Resolution:
Keywords:  simple  |
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Comment (by dustin):

 The only "real" use for `listBuilderNames` is in the configuration module,
 for error checking.  Still, I think that makes sense, so we can keep it.

 `getPendingBuildTimes`, however, is only used in tests, so it can go.

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Ticket URL: <http://trac.buildbot.net/ticket/2653#comment:2>
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