Remove spammy CMake message

[chapulina]

Signed-off-by: Louise Poubel [email protected]

🦟 Bug fix

Summary

Introduced in #121

It goes to stderr:

--- stderr: ignition-launch5                                                                                  
launch_exe_location ../../../lib/ignition/launch5/$<TARGET_FILE_NAME:ign-launch>
---
Finished <<< ignition-launch5 [13.5s]

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

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[codecov]

Codecov Report

Merging #142 (1e90297) into ign-launch5 (8668a50) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           ign-launch5     #142   +/-   ##
============================================
  Coverage        32.92%   32.92%           
============================================
  Files                4        4           
  Lines              817      817           
============================================
  Hits               269      269           
  Misses             548      548           

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[osrf-triage]

This pull request has been mentioned on Gazebo Community. There might be relevant details there:

https://community.gazebosim.org/t/new-ignition-releases-2022-03-25-fortress-edifice-citadel/1343/1