fix trailing whitesaces and newlines at end of files

scss/_animated.scss

@@ -150,4 +150,3 @@
   0% { transform: rotate(0deg); }
   100% { transform: rotate(360deg); }
 }
-

scss/_icons.scss

@@ -7,4 +7,3 @@ readers do not read off random characters that represent icons */
 @each $name, $icon in $fa-icons {
   .#{$fa-css-prefix}-#{$name}::before { content: unquote("\"#{ $icon }\""); }
 }
-

scss/_mixins.scss

@@ -72,4 +72,3 @@
     content: unquote("\"#{ $fa-var }\"");
   }
 }
-

scss/_shims.scss

@@ -2039,4 +2039,3 @@
   font-family: 'Font Awesome 6 Brands';
   font-weight: 400;
 }
-