Revert "ogre2: retain CMAKE_INSTALL_RPATH values"

[mjcarroll]

Reverts #909

[codecov]

Codecov Report

Merging #910 (8082c90) into gz-rendering8 (8c1fd27) will not change coverage.
The diff coverage is n/a.

❗ Current head 8082c90 differs from pull request most recent head 21ab227. Consider uploading reports for the commit 21ab227 to get more accurate results

@@              Coverage Diff               @@
##           gz-rendering8     #910   +/-   ##
==============================================
  Coverage          75.18%   75.18%           
==============================================
  Files                177      177           
  Lines              16846    16846           
==============================================
  Hits               12665    12665           
  Misses              4181     4181           

[scpeters]

CI is still failing; I think #909 was not the cause of the macOS build failure; I'll review the previous failed builds to track it down

[iche033]

we can close this one?

[scpeters]

yes, the CI issues were fixed by #911