[DOCS] Removes duplicate content

docs/release-notes/7.10.asciidoc

@@ -81,86 +81,3 @@ image::images/detection-rule-failure.png[]
 
 * When adding a rule exception, you cannot select value lists of type `ip_range`. Lists of type `ip_range` will not appear in the **Add Exception** dropdown as possible values after selecting the is in list operator. ({pull}79511[#79511]).
 
-[[release-notes-7.9-header]]
-== 7.9
-
-[discrete]
-[[release-notes-7.9.1]]
-=== 7.9.1
-
-[discrete]
-[[upgrade-notes-7.9.1]]
-==== Post upgrade requirements
-
-After upgrading the {stack} to version 7.9.0 and 7.9.1 from a previous minor
-release (7.8.x, 7.7.x, and so on), you need to:
-
-* <<enable-detections-ui, Enable access to the Detections page>>. Previously
-activated detection rules continue to run after upgrading, and this is only
-required to enable the UI.
-* <<post-upgrade-req, Enable the process analyzer>>. This is only required if you want to view
-<<alerts-analyze-events, graphical representations of process relationships>>.
-
-[discrete]
-[[bug-fixes-7.9.1]]
-==== Bug fixes and enhancements
-
-* Fixes closing alerts via exceptions ({pull}76145[#76145]).
-* Fixes selecting all alerts issue ({pull}75945[#75945]).
-* Fixes issues when exceptions are no longer associated with a rule
-({pull}76012[#76012]).
-* Prevents adding exceptions to unsupported rule types ({pull}75802[#75802]).
-* Corrects error messages for insufficient {ml} permissions
-({pull}74582[#74582]).
-* Increases permissions granularity for the `.lists` system index
-({pull}75378[#75378]).
-
-
-[discrete]
-[[release-notes-7.9.0]]
-=== 7.9.0
-
-[discrete]
-[[breaking-changes-7.9]]
-==== Breaking changes
-
-*Actions API*
-
-When you <<register-connector, create a {sn} connector>> via the Actions API:
-
-* The `casesConfiguration` object is obsolete. Instead, use
-`incidentConfiguration`.
-* To see {sn} connectors in the UI, you must use the `isCaseOwned` field.
-
-IMPORTANT: These changes only apply to {sn} connectors.
-
-[discrete]
-[[known-issues-7.9.0]]
-==== Known issues
-
-* After changing the `xpack.encryptedSavedObjects.encryptionKey` setting value
-and restarting Kibana, you must restart all detection rules
-({issue}74393[#74393]).
-* When selecting all alerts on the *Detections* page, some alerts are not marked
-as selected in the UI ({issue}75194[#75194]).
-* When creating rules, if you have more than one Timeline template the template
-drop-down list is truncated ({issue}75196[#75196]).
-* Exceptions cannot be added to or viewed in imported rules when the exception
-list has been deleted or does not exist in the {kib} space
-({issue}75182[#75182]).
-* Updates to a Timeline may not be saved when you immediately close the
-Timeline or navigate to a different page ({issue}75292[#75292]).
-
-[discrete]
-[[bug-fixes-7.9.0]]
-==== Bug fixes and enhancements
-
-* Fixes rule tags to accept special characters and keywords: `AND`, `OR`, `(`,
-`)`, `"`, and `*` ({pull}74003[#74003]).
-* Fixes broken link from the Network map to {kib} index management
-({pull}73757[#73757]).
-* Fixes unresponsive Timeline issues when dragging the `process.hash.sha256`
-field to Timeline ({pull}72142[#72142]).
-* Fixes Timeline page scrolling with saved queries issue ({pull}69433[#69433]).
-* Fixes a UI issue with opening and closing alerts ({pull}69217[#69217]).
-* Fixes display of long rule reference URLs ({pull}68640[#68640]).