bootstrap.scss: Cleanup comments; refs #18036

[skip sauce]
[skip validator]

scss/bootstrap.scss

@@ -4,11 +4,11 @@
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 
- // Core variables and mixins
+// Core variables and mixins
 @import "variables";
 @import "mixins";
 
-// // Reset and dependencies
+// Reset and dependencies
 @import "normalize";
 @import "print";
 
@@ -22,7 +22,7 @@
 @import "forms";
 @import "buttons";
 
-// // Components
+// Components
 @import "animation";
 @import "dropdown";
 @import "button-group";