ui: drop blueprintjs 6 (#1073)

packages/ui-default/theme/dark.styl

@@ -212,10 +212,6 @@ $hover-background-color = #424242
   .menu__link.highlight
     background: rgb(40, 11, 20)
 
-  .bp6-tag.bp6-minimal:not([class*="bp6-intent-"])
-    background-color: rgba(87, 100, 117, .2)
-    color: #d9dfe7
-
   .typo table thead th
     background: #1e1e1e
     background-color: rgb(30, 30, 30)
@@ -391,18 +387,6 @@ $hover-background-color = #424242
       background-color: $main-background-color !important
       border-color: #3d3d3d !important
 
-  .bp6-tab
-    color: #aaa
-
-    &[aria-disabled=true]
-      color: #555
-  
-  .bp6-card,.bp6-dialog,.bp6-dialog-header,.bp6-dialog-footer
-    background-color: #1f1f1f !important
-  
-  .bp6-input-group input
-    border-color: #3d3d3d!important
-
   &.hasjs .collapsed #status:not([data-status="7"]) .compiler-text-mask
     background-image: linear-gradient(to bottom, transparent, #000000 25px)