Revert "Merge pull request #65384 from yariks5s/docs_for_group_concat"

This reverts commit ab7ba4efd9, reversing
changes made to 87b91c6115.

docs/en/sql-reference/aggregate-functions/reference/groupconcat.md

@@ -1,90 +0,0 @@
----
-slug: /en/sql-reference/aggregate-functions/reference/groupconcat
-sidebar_position: 363
-sidebar_label: groupConcat
-title: groupConcat
----
-
-Calculates a concatenated string from a group of strings, optionally separated by a delimiter, and optionally limited by a maximum number of elements.
-
-**Syntax**
-
-``` sql
-groupConcat(expression [, delimiter] [, limit]);
-```
-
-**Arguments**
-
-- `expression` — The expression or column name that outputs strings to be concatenated..
-- `delimiter` — A [string](../../../sql-reference/data-types/string.md) that will be used to separate concatenated values. This parameter is optional and defaults to an empty string if not specified.
-- `limit` — A positive [integer](../../../sql-reference/data-types/int-uint.md) specifying the maximum number of elements to concatenate. If more elements are present, excess elements are ignored. This parameter is optional.
-
-:::note
-If delimiter is specified without limit, it must be the first parameter following the expression. If both delimiter and limit are specified, delimiter must precede limit.
-:::
-
-**Returned value**
-
-- Returns a [string](../../../sql-reference/data-types/string.md) consisting of the concatenated values of the column or expression. If the group has no elements or only null elements, and the function does not specify a handling for only null values, the result is a nullable string with a null value.
-
-**Examples**
-
-Input table:
-
-``` text
-┌─id─┬─name─┐
-│ 1  │  John│
-│ 2  │  Jane│
-│ 3  │   Bob│
-└────┴──────┘
-```
-
-1.	Basic usage without a delimiter:
-
-Query:
-
-``` sql
-SELECT groupConcat(Name) FROM Employees;
-```
-
-Result:
-
-``` text
-JohnJaneBob
-```
-
-This concatenates all names into one continuous string without any separator.
-
-
-2. Using comma as a delimiter:
-
-Query:
-
-``` sql
-SELECT groupConcat(Name, ', ', 2) FROM Employees;
-```
-
-Result:
-
-``` text
-John, Jane, Bob
-```
-
-This output shows the names separated by a comma followed by a space.
-
-
-3. Limiting the number of concatenated elements
-
-Query:
-
-``` sql
-SELECT groupConcat(Name, ', ', 2) FROM Employees;
-```
-
-Result:
-
-``` text
-John, Jane
-```
-
-This query limits the output to the first two names, even though there are more names in the table.

utils/check-style/aspell-ignore/en/aspell-dict.txt

@@ -1709,7 +1709,6 @@ groupBitmap
 groupBitmapAnd
 groupBitmapOr
 groupBitmapXor
-groupConcat
 groupUniqArray
 grouparray
 grouparrayinsertat
@@ -1726,7 +1725,6 @@ groupbitmapor
 groupbitmapxor
 groupbitor
 groupbitxor
-groupconcat
 groupuniqarray
 grpc
 grpcio