Hey @dantahoua!
Unfortunately it won’t be possible to clear out the CSS styles completely. However, you can disable Font Awesome from the plugin. Here’s what you will need to do.
Please open /event-calendar-wd/css/font-awesome/font-awesome.css file and remove the following lines from there:
@font-face {
font-family: 'FontAwesome';
src: url('fonts/fontawesome-webfont.eot?v=4.2.0');
src: url('fonts/fontawesome-webfont.eot?#iefix&v=4.2.0') format('embedded-opentype'), url('fonts/fontawesome-webfont.woff?v=4.2.0') format('woff'), url('fonts/fontawesome-webfont.ttf?v=4.2.0') format('truetype'), url('fonts/fontawesome-webfont.svg?v=4.2.0#fontawesomeregular') format('svg');
font-weight: normal;
font-style: normal;
}
Let us know if this helps.
Thanks! Have a great day!