Xsy image remove for course home messages at theme level

lms/static/sass/features/_course-experience.scss

@@ -423,13 +423,6 @@
   }
 }
 
-#expand-collapse-outline-all-button {
-  float: right;
-  background-color: transparent;
-  color: $black;
-  cursor: pointer;
-}
-
 // extra padding for expand/collapse text change
 .expand-collapse-outline-all-extra-padding {
   padding: 0 4px;

openedx/features/course_experience/static/course_experience/fixtures/course-outline-fragment.html

 <section class="course-outline" id="main">
-  <button class="btn btn-primary"
+  <button class="btn btn-outline-primary pull-right"
           id="expand-collapse-outline-all-button"
           aria-expanded="false"
           aria-controls="course-outline-block-tree"

openedx/features/course_experience/templates/course_experience/course-outline-fragment.html

@@ -28,7 +28,7 @@ dates_banner_displayed = False
 <main role="main" class="course-outline" id="main" tabindex="-1">
     <%include file="/dates_banner.html" />
     % if course_sections is not None:
-        <button class="btn btn-primary"
+        <button class="btn btn-outline-primary pull-right"
                 id="expand-collapse-outline-all-button"
                 aria-expanded="false"
                 aria-controls="course-outline-block-tree"