Remove operators "|||" from the dictionary

* "|||" does not seem to be used as a programming language operator.
* For (stretchy) fences, U+2980 is more appropriate than "|||"

w3c/mathml#143
w3c/mathml#176

unicode.xml

@@ -1827,13 +1827,6 @@ Barbara Beeton for the STIX project
          <operator-dictionary priority="20" form="postfix" fence="true" lspace="0" rspace="0"/>
          <description>MULTIPLE CHARACTER OPERATOR: ||</description>
       </character>
-      <character id="U0007C-0007C-0007C" dec="124-124-124" image="none">
-         <unicodedata/>
-         <operator-dictionary priority="270" form="infix" lspace="3" rspace="3" fence="true"/>
-         <operator-dictionary priority="20" form="prefix" fence="true" lspace="0" rspace="0"/>
-         <operator-dictionary priority="20" form="postfix" fence="true" lspace="0" rspace="0"/>
-         <description>MULTIPLE CHARACTER OPERATOR: |||</description>
-      </character>
       <character id="U0007D" dec="125" mode="math" type="closing">
          <unicodedata category="Pe" combclass="0" bidi="ON" mirror="Y" unicode1="CLOSING CURLY BRACKET" mathclass="C" alias="closing brace;closing curly bracket"/>
          <afii>007D</afii>