[rubygems/rubygems] Remove no longer needed RUBYGEMS_TEST_PATH env variable
RUBYGEMS_TEST_PATH
https://github.com/rubygems/rubygems/commit/0efb894c3b
[rubygems/rubygems] Remove no longer needed
RUBYGEMS_TEST_PATHenv variablehttps://github.com/rubygems/rubygems/commit/0efb894c3b