.eslintrc.json: remove duplicate key "require-jsdoc"
.eslintrc.json: remove duplicate key "require-jsdoc"

Change-Id: Iab11cc695c411cc1fade5ff90f661a816c1b06af

GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project