Remove legacy editor configuration

Author: mquevill

styles/syntax-legacy/_base.less

@@ -1,90 +1,5 @@
 @import 'syntax-variables';
 
-atom-text-editor {
-  background-color: @syntax-background-color;
-  color: @syntax-text-color;
-
-  .invisible-character {
-    color: @syntax-invisible-character-color;
-  }
-
-  .indent-guide {
-    color: @syntax-indent-guide-color;
-  }
-
-  .wrap-guide {
-    background-color: @syntax-wrap-guide-color;
-  }
-
-  .gutter {
-    background-color: @syntax-gutter-background-color;
-  }
-
-  .line-number.cursor-line-no-selection {
-    background-color: @syntax-gutter-background-color-selected;
-  }
-
-  .invisible {
-    color: @syntax-text-color;
-  }
-
-  .cursor {
-    border-color: @syntax-cursor-color;
-  }
-
-  .selection .region {
-    background-color: @syntax-selection-color;
-  }
-
-  .search-results .syntax--marker .region {
-    background-color: transparent;
-    border: 1px solid @syntax-result-marker-color;
-  }
-
-  .search-results .syntax--marker.current-result .region {
-    border: 1px solid @syntax-result-marker-color-selected;
-  }
-
-  .syntax--gfm {
-    .syntax--markup {
-      &.syntax--heading {
-        color: @green;
-        font-weight: bold;
-      }
-
-      &.syntax--underline {
-        color: @yellow;
-        text-decoration: underline;
-      }
-    }
-
-    .syntax--bold {
-      font-weight: bold;
-    }
-
-    .syntax--italic {
-      font-style: italic;
-    }
-
-    .syntax--raw {
-      color: @blue;
-    }
-
-    .syntax--variable.syntax--list {
-      color: @pink;
-      font-weight: bold;
-    }
-
-    .syntax--link {
-      color: @light-gray;
-
-      .syntax--entity {
-        color: @purple;
-      }
-    }
-  }
-}
-
 .syntax--comment {
   color: @brown;
 }
@@ -189,12 +104,6 @@ atom-text-editor {
   color: @purple;
 }
 
-// Prevent underlines from making their way into whitespace elements
-.leading-whitespace,
-.trailing-whitespace {
-  display: inline-block;
-}
-
 .syntax--js {
   .syntax--template {
     .syntax--element {