ref(css): removed unused thumbnail styles (#23079)

Author: robinrendle

src/sentry/static/sentry/less/includes/bootstrap/bootstrap.less

@@ -27,7 +27,6 @@
 @import 'pagination.less';
 @import 'labels.less';
 @import 'badges.less';
-@import 'thumbnails.less';
 @import 'alerts.less';
 @import 'progress-bars.less';
 @import 'media.less';

src/sentry/static/sentry/less/includes/bootstrap/media.less

@@ -19,11 +19,6 @@
 
 .media-object {
   display: block;
-
-  // Fix collapse in webkit from max-width: 100% and display: table-cell.
-  &.img-thumbnail {
-    max-width: none;
-  }
 }
 
 .media-right,

src/sentry/static/sentry/less/includes/bootstrap/scaffolding.less

@@ -8,21 +8,6 @@
   border-radius: @border-radius-large;
 }
 
-// Image thumbnails
-//
-// Heads up! This is mixin-ed into thumbnails.less for `.thumbnail`.
-.img-thumbnail {
-  padding: @thumbnail-padding;
-  line-height: @line-height-base;
-  background-color: @thumbnail-bg;
-  border: 1px solid @thumbnail-border;
-  border-radius: @thumbnail-border-radius;
-  .transition(all 0.2s ease-in-out);
-
-  // Keep them at most 100% wide
-  .img-responsive(inline-block);
-}
-
 // Perfect circle
 .img-circle {
   border-radius: 50%; // set radius in percents

src/sentry/static/sentry/less/includes/bootstrap/theme.less

@@ -108,15 +108,6 @@
   .btn-styles(@btn-danger-bg);
 }
 
-//
-// Images
-// --------------------------------------------------
-
-.thumbnail,
-.img-thumbnail {
-  .box-shadow(0 1px 2px rgba(0, 0, 0, 0.075));
-}
-
 //
 // Dropdowns
 // --------------------------------------------------