Remove national flags from the language select.(Solution 2) (#825)

* Remove national flags from the language select.

* Removed flag-icon-css.

* Removed the line break for old language select.

assets/img/flags/ps.svg

@@ -1,15 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" height="480" width="640" version="1">
-  <defs>
-    <clipPath id="a">
-      <path fill-opacity=".67" d="M-118 0h682.67v512H-118z"/>
-    </clipPath>
-  </defs>
-  <g clip-path="url(#a)" transform="translate(110.63) scale(.9375)">
-    <g fill-rule="evenodd" stroke-width="1pt">
-      <path d="M-246 0H778.002v170.667H-246z"/>
-      <path fill="#fff" d="M-246 170.667H778.002v170.667H-246z"/>
-      <path fill="#090" d="M-246 341.334H778.002v170.667H-246z"/>
-      <path d="M-246 512.001l512.001-256L-246 0v512.001z" fill="red"/>
-    </g>
-  </g>
-</svg>