Remove duplicate $strcasecmp toc entry

Author: i80and

source/includes/ref-toc-aggregation-string.yaml

@@ -24,13 +24,6 @@ description: |
   array of substrings. If the delimiter is not found within the string,
   returns an array containing the original string.
 ---
-name: :expression:`$strcasecmp`
-file: /reference/operator/aggregation/strcasecmp
-description: |
-  Performs case-insensitive string comparison and returns: ``0`` if two
-  strings are equivalent, ``1`` if the first string is greater than the
-  second, and ``-1`` if the first string is less than the second.
----
 name: :expression:`$strLenBytes`
 file: /reference/operator/aggregation/strLenBytes
 description: |