do not specify anti-aliasing (#8689)

specifying the anti-aliasing implies we know better than the browser (we
don't).  Specifiying this globally prevents the use of sub-pixel anti-aliasing
where it is available and the browsers text rendering engines are these
days pretty much fantastic that they should not need these hacks.

and for good measure - here is an article from 10 years ago
https://usabilitypost.com/2012/11/05/stop-fixing-font-smoothing/
and the mozilla doc saying do not use it on a public facing web site.
https://developer.mozilla.org/en-US/docs/Web/CSS/font-smooth

war/src/main/scss/base/_core.scss

@@ -1,8 +1,6 @@
 html {
   height: 100%;
   box-sizing: border-box;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
   -webkit-tap-highlight-color: transparent;
   color: var(--text-color);
 }