disable full text index file

[akshu-a-k]

Implemented task for #9800

Mandatory checks

• Change in CHANGELOG.md described in a way that is understandable for the average user (if applicable)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (for UI changes)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• Checked documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request to the documentation repository.

[calixtus]

Hi, thanks for your interest in JabRef and OpenSource. Unfortunately your PR just copies a PR that was already discussed and not accepted, as it would not solve the fundamental issue and is in itself wrong. See #10820.
Please be so kind to read in the future the issue discussions including the closed attempts to fix before creating a PR.
Therefor closing this. Maybe you would like to choose another Good First Issue from our list?