kill random grey backgrounds for transparent avatars

src/skins/vector/css/atoms/MemberAvatar.css

@@ -17,6 +17,5 @@ limitations under the License.
 .mx_MemberAvatar {
     z-index: 20;
     border-radius: 20px;
-    background-color: #dbdbdb;
 }
 

src/skins/vector/css/molecules/EventTile.css

@@ -30,7 +30,6 @@ limitations under the License.
 }
 
 .mx_EventTile_avatar img {
-    background-color: #dbdbdb;
     border-radius: 20px;
     border: 0px;
 }

src/skins/vector/css/molecules/MessageComposer.css

@@ -39,7 +39,6 @@ limitations under the License.
 .mx_MessageComposer .mx_MessageComposer_avatar img {
     margin-top: 18px;
     border-radius: 20px;
-    background-color: #dbdbdb;
 }
 
 .mx_MessageComposer_input {

src/skins/vector/css/molecules/RoomTile.css

@@ -35,7 +35,6 @@ limitations under the License.
 
 .mx_RoomTile_avatar img {
     border-radius: 20px;
-    background-color: #dbdbdb;
 }
 
 .mx_RoomTile_name {