Take out space condensing NUI course navigation

refs: CNVS-27361

Links in the account navigation (ie, Courses/Modules/Pages, etc) no
longer condense space when screen height is smaller

Test Plan:
- In NUI, make your browser window height small
- Open up a page showing the account navigation; it should no longer
change spacing if browser window height is small
- what to: http://cl.ly/432M403A2c1L

Change-Id: If98b1fe5f652e32f48fd8e499c00b49f49218540
Reviewed-on: https://gerrit.instructure.com/73372
Tested-by: Jenkins
Reviewed-by: Pam Hiett <phiett@instructure.com>
Product-Review: Pam Hiett <phiett@instructure.com>
QA-Review: Myller de Araujo <myller@instructure.com>

app/stylesheets/base/_ic_app_layout.scss

@@ -101,7 +101,6 @@ $ic-left-side-width: $ic-sp*15;
     opacity: 1;
     transform: translate3d(0,0,0);
   }
-  @include breakpoint(short) { padding-top: $ic-sp; }
 }
 
 .ic-app-main-content {

app/stylesheets/components/_components.scss

@@ -68,7 +68,6 @@ $ic-brand-course-nav-link--active: $ic-brand-primary;
           font-weight: 300;
           border-radius: $baseBorderRadius;
           padding: $ic-sp/2 $ic-sp;
-          @include breakpoint(short) { padding: $ic-sp/4 $ic-sp; }
           &:hover, &:focus { background: lighten($ic-color-neutral, 5%); }
         }
         // Default UI styles