Remove the LTO patch that is not needed anymore

[certik]

Checklist

• [x] Used a personal fork of the feedstock to propose changes
• [x] Bumped the build number (if the version is unchanged)
• [x] Reset the build number to 0 (if the version changed)
• [x] Re-rendered with the latest conda-smithy (Use the phrase code>@<space/conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• [x] Ensured the license file is being packaged.

[conda-forge-webservices[bot]]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[certik]

@conda-forge-admin, please rerender

[github-actions[bot]]

Hi! This is the friendly automated conda-forge-webservice.

I tried to rerender for you, but it looks like there was nothing to do.

This message was generated by GitHub actions workflow run https://github.com/conda-forge/lfortran-feedstock/actions/runs/6495675772.

[certik]

I clicked the merge button and it seems it got merged, but the UI here shows as unmerged.

[certik]

Here is the merge commit: https://github.com/conda-forge/lfortran-feedstock/commit/8f878870c369b1e0761a36accd5ea63fbf5d2181