css remove float from clear

float was actually causing it to behave in an unexpected manner.
and remove duplicate clear rule.

browser/css/vidjil.less

@@ -2100,7 +2100,6 @@ flex-grow : 1;
 
 .clear {
     clear: both;
-    float: left;
 }
 
 .centered {
@@ -2290,10 +2289,6 @@ form {
     }
 }
 
-.clear {
-    clear: both;
-}
-
 .error {
     font-weight: bold;
     color: red;