docs: remove empty sections

Author: kenjis

user_guide_src/source/changelogs/v4.2.3.rst

@@ -9,26 +9,11 @@ Release Date: August 6, 2022
     :local:
     :depth: 2
 
-BREAKING
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 Enhancements
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 - Now ``Security::generateHash()`` is public, and can be used to regenerate CSRF token manually when ``Config\Security::$regenerate`` is false.
 
-Changes
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user_guide_src/source/changelogs/v4.2.5.rst

@@ -21,16 +21,6 @@ Enhancements
 
 - Kint has been updated to 4.2.0.
 
-Changes
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-Deprecations
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 Bugs Fixed
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 - When using subqueries in the main query, prefixes are added to the table alias.

user_guide_src/source/changelogs/v4.2.6.rst

@@ -9,21 +9,6 @@ Release Date: September 4, 2022
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     :depth: 2
 
-BREAKING
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user_guide_src/source/changelogs/v4.2.7.rst

@@ -22,27 +22,12 @@ BREAKING
 -  ``Time::__toString()`` is now locale-independent. It returns database-compatible strings like '2022-09-07 12:00:00' in any locale.
 - The Validation rule ``Validation\Rule::required_without()`` and ``Validation\StrictRules\Rule::required_without()`` parameters have been changed and the logic of these rule has also been fixed.
 
-Enhancements
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 Message Changes
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 - Fixed typos in some items in ``Language/en/Email.php``.
 - Added missing item ``valid_json`` in ``Language/en/Validation.php``.
 
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user_guide_src/source/changelogs/v4.2.8.rst

@@ -9,26 +9,6 @@ Release Date: October 30, 2022
     :local:
     :depth: 2
 
-BREAKING
-********
-
-none.
-
-Enhancements
-************
-
-none.
-
-Message Changes
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-
-none.
-
-Changes
-*******
-
-none.
-
 Deprecations
 ************