The NPM package for jQuery Color was updated in [50543], but a bundled version still existed within core.
This removes that bundled version, in favor of expanding the Grunt build steps to include the package from NPM instead.
Fixes#55016. See #51405.
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git-svn-id: http://core.svn.wordpress.org/trunk@52246 1a063a9b-81f0-0310-95a4-ce76da25c4cd