<div class="article-view-content col-md-12 col-sm-12 col-xs-12 no-padding-left no-padding-right wiki"
  ng-bind-html="vm.article.content | ArticlesTrim">
</div>

angular
 .module('articles')
 .filter('ArticlesTrim', ArticlesTrim)

ArticlesTrim.$inject = [];
function ArticlesTrim() {
 return function (htmlContent) {
 var re = /<p><br\/><\/p>|<p><br><\/p>|<p>\s<\/p>/g;
 var trimLFCR = htmlContent.replace(re, '');
 return trimLFCR;
 }
}

<p><br/></p>
<p><br></p>
<p>\s<\/p>

<p><br/></p>

<p><br\/><\/p>

ArticlesTrim.$inject = [];
function ArticlesTrim() {
 return function (htmlContent) {
 var regex = new RegExp('<p><br/></p>', 'g'); 
 var trimLFCR = htmlContent.replace(regex, '');
 regex = new RegExp('<p><br></p>', 'g');
 trimLFCR = trimLFCR.replace(regex, '');
 return trimLFCR;
 }
}