fix: remove TEMPLATES/.secretlintignore (#3476)

CHANGELOG.md

@@ -26,6 +26,7 @@ Note: Can be used with `oxsecurity/megalinter@beta` in your GitHub Action mega-l
   - Salesforce linters: use sf + default Flow Scanner rules
   - Disable JSON_ESLINT_PLUGIN_JSONC until <https://github.com/ota-meshi/eslint-plugin-jsonc/issues/328> is fixed
   - Upgrade tar in mega-linter-runner
+  - secretlint: remove default `.secretlintignore` that was never used but `.gitignore` is used instead. Fixes [#3328](https://github.com/oxsecurity/megalinter/issues/3328)
 
 - Doc
   - Update R2DevOps logo

docs/descriptors/repository_secretlint.md

@@ -20,7 +20,7 @@ description: How to use secretlint (configure, ignore files, ignore errors, help
 - See [How to configure secretlint rules](https://github.com/secretlint/secretlint#configuration){target=_blank}
   - If custom `.secretlintrc.json` config file isn't found, [.secretlintrc.json](https://github.com/oxsecurity/megalinter/tree/main/TEMPLATES/.secretlintrc.json){target=_blank} will be used
 - See [How to ignore files and directories with secretlint](https://github.com/secretlint/secretlint/blob/master/docs/configuration.md#secretlintignore){target=_blank}
-  - If custom `.secretlintignore` ignore file is not found, [.secretlintignore](https://github.com/oxsecurity/megalinter/tree/main/TEMPLATES/.secretlintignore){target=_blank} will be used
+  - You can define a `.secretlintignore` file to ignore files and folders
 - See [Index of problems detected by secretlint](https://github.com/secretlint/secretlint#rule-packages){target=_blank}
 
 [![secretlint - GitHub](https://gh-card.dev/repos/secretlint/secretlint.svg?fullname=)](https://github.com/secretlint/secretlint){target=_blank}