chore: Removes unnecessary creation of symlink in CMake install file

[bthomee]

High Level Overview of Change

This change removes the creation of a symlink that after #5975 results in errors, by updating the renaming script.

Context of Change

The changes in #5975 renamed ripple(d) to xrpl(d) in CMake files. Previously, changes had already been made in anticipation of this renaming, whereby a symlink "ripple" was made to point to "xrpl". Now after renaming, "ripple" has become "xrpl" and a symlink is attempted to be made from "xrpl" to "xrpl", which therefore fails. This symlink is thus now no longer needed, and can be removed.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking change that only restructures code)
• Performance (increase or change in throughput and/or latency)
• Tests (you added tests for code that already exists, or your new feature included in this PR)
• Documentation update
• Chore (no impact to binary, e.g. .gitignore, formatting, dropping support for older tooling)
• Release

[a1q123456]

lgtm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.3%. Comparing base (28a1f90) to head (92e80ed).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #6009   +/-   ##
=======================================
  Coverage     78.3%   78.3%           
=======================================
  Files          816     816           
  Lines        68887   68887           
  Branches      8304    8304           
=======================================
  Hits         53942   53942           
  Misses       14945   14945           

see 4 files with indirect coverage changes

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