@Q:
RETURN REMOVE_VALUE( [ <span class="hljs-string">"a"</span>, <span class="hljs-string">"b"</span>, <span class="hljs-string">"b"</span>, <span class="hljs-string">"a"</span>, <span class="hljs-string">"c"</span> ], <span class="hljs-string">"a"</span> )

@R
[
  [
    <span class="hljs-string">"b"</span>,
    <span class="hljs-string">"b"</span>,
    <span class="hljs-string">"c"</span>
  ]
]