Reduce number of font size

assets/sass/_activity_stream.sass

@@ -8,7 +8,6 @@
   margin-left: 10px
   font-weight: normal
   color: #999
-  font-size: 0.8em
 
 .activity-content
   margin-left: 55px
@@ -19,7 +18,6 @@
   border-bottom: 1px dotted #efefef
 
 .activity-description
-  font-size: 0.95em
   color: #555
   margin-top: 10px
   li