[8.19] [ML] Removing removeIfExists from sync task scheduler (#228783) (#229916)

# Backport

This will backport the following commits from `main` to `8.19`:
- [[ML] Removing removeIfExists from sync task scheduler
(#228783)](#228783)

<!--- Backport version: 9.6.6 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

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Removing removeIfExists from sync task scheduler (#228783)\n\nThe call
to `removeIfExists` is not necessary and can result in a\npossible race
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https://github.com/elastic/kibana/issues/226554\nRelated to
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Removing removeIfExists from sync task
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Removing removeIfExists from sync task scheduler (#228783)\n\nThe call
to `removeIfExists` is not necessary and can result in a\npossible race
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https://github.com/elastic/kibana/issues/226554\nRelated to
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Removing removeIfExists from sync task scheduler (#228783)\n\nThe call
to `removeIfExists` is not necessary and can result in a\npossible race
condition when the sync task is claimed.\nFixes
https://github.com/elastic/kibana/issues/226554\nRelated to
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[ML] Removing removeIfExists from sync task scheduler (#228783)
(#229686)\n\n# Backport\n\nThis will backport the following commits from
`main` to `9.0`:\n- [[ML] Removing removeIfExists from sync task
scheduler\n(#228783)](https://github.com/elastic/kibana/pull/228783)\n\n\n\n###
Questions ?\nPlease refer to the [Backport
tool\ndocumentation](https://github.com/sorenlouv/backport)\n\n\n\nCo-authored-by:
James Gowdy
<[email protected]>"}},{"branch":"9.1","label":"v9.1.1","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"8.18","label":"v8.18.5","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"url":"https://github.com/elastic/kibana/pull/229684","number":229684,"state":"MERGED","mergeCommit":{"sha":"e8dd72e7489f6b2f7dad4d3a6a93b7b0601bdb35","message":"[8.18]
[ML] Removing removeIfExists from sync task scheduler (#228783)
(#229684)\n\n# Backport\n\nThis will backport the following commits from
`main` to `8.18`:\n- [[ML] Removing removeIfExists from sync task
scheduler\n(#228783)](https://github.com/elastic/kibana/pull/228783)\n\n\n\n###
Questions ?\nPlease refer to the [Backport
tool\ndocumentation](https://github.com/sorenlouv/backport)\n\n\n\nCo-authored-by:
James Gowdy
<[email protected]>"}},{"branch":"8.19","label":"v8.19.1","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: James Gowdy <[email protected]>

Author: kibanamachine

x-pack/platform/plugins/shared/ml/server/saved_objects/sync_task.ts

@@ -135,7 +135,6 @@ export class SavedObjectsSyncService {
   ): Promise<TaskInstance | null> {
     this.core = core;
     try {
-      await taskManager.removeIfExists(SAVED_OBJECTS_SYNC_TASK_ID);
       const state: LatestTaskStateSchema = {
         runs: 0,
         totalSavedObjectsSynced: 0,