modify: remove tooltips

browser/main/NoteList/NoteList.styl

@@ -39,8 +39,6 @@ $control-height = 30px
     color $ui-active-color
   &:hover
     color $ui-text-color
-    .control-button-tooltip
-      opacity 1
 
 .control-button--active
   @extend .control-button
@@ -48,17 +46,6 @@ $control-height = 30px
   &:hover
     color $ui-active-color
 
-.control-button-tooltip
-  tooltip()
-  position absolute
-  top 20px
-  right 5px
-  padding 5px
-  opacity 0
-  white-space nowrap
-  border-radius 2px
-  z-index 1
-
 .list
   absolute left right bottom
   top $control-height

browser/main/NoteList/index.js

@@ -395,9 +395,6 @@ class NoteList extends React.Component {
             onClick={(e) => this.handleListStyleButtonClick(e, 'DEFAULT')}
           >
             <i className='fa fa-th-large'/>
-            <span styleName='control-button-tooltip'>
-              Default Size
-            </span>
           </button>
           <button styleName={config.listStyle === 'SMALL'
               ? 'control-button--active'
@@ -406,9 +403,6 @@ class NoteList extends React.Component {
             onClick={(e) => this.handleListStyleButtonClick(e, 'SMALL')}
           >
             <i className='fa fa-list-ul'/>
-            <span styleName='control-button-tooltip'>
-              Small Size
-            </span>
           </button>
         </div>
         <div styleName='list'