Solution:
The easy way is using Blade comments instead of HTML comments, you are indeed using blade, so, why use other kind of comments?
Blade comments:
{{-- This comment will not be present in the rendered HTML --}}
Now, if you insists on removing HTML comments, you could actually do some minification of the HTML at the same time.
You could do a Middleware that process the output and remove comments, remove spaces, and other stuffs.
Take a look at this solution: https://asked.io/laravel-5-minify-middleware
And maybe just include a pattern matching like this '/<!--[^\[](.*?)[^\]]-->/s' => '', to the list of replacements and that should work.
Or you could actually search for a minification library and use it in that middleware.
Do notice that this process adds a little of overhead, not much actually, but some.
The best and more efficient solution to just remove the comments would be to use Blade comments.