[wp-trac] [WordPress Trac] #36489: Optimize Grunt `prerelease` task

[WordPress Trac]

#36489: Optimize Grunt `prerelease` task
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 Reporter:  netweb            |      Owner:
     Type:  enhancement       |     Status:  new
 Priority:  normal            |  Milestone:  Future Release
Component:  Build/Test Tools  |    Version:  4.5
 Severity:  normal            |   Keywords:  has-patch commit
  Focuses:                    |
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 Previously in #35557 via r36930 the task `grunt prerelease` was added.

 Currently this task runs `grunt build` twice once when called in the task
 list as `build` and the other via the `precommit:js` task, which calls the
 `qunit:compiled` task in which `build` is a task of that task.

 Removing the extra `build` task from the `prerelease` saves time by not
 running `grunt build` twice.

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Ticket URL: <https://core.trac.wordpress.org/ticket/36489>
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