Remove C++14 construct from public header

1 job for master in 60 minutes and 2 seconds (queued for 73 minutes and 59 seconds)
Status Job ID Name Coverage
  Build
failed #75069
linux kf5-qt5 qt5.12

01:00:02

1.0%
 
Name Stage Failure
failed
linux kf5-qt5 qt5.12 Build The script exceeded the maximum execution time set for the job
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WARNING: Uploading artifacts as "archive" to coordinator... failed id=75069 responseStatus=502 Bad Gateway status=502 token=zyEBs99B
WARNING: Retrying... context=artifacts-uploader error=invalid argument
WARNING: Uploading artifacts as "archive" to coordinator... failed id=75069 responseStatus=502 Bad Gateway status=502 token=zyEBs99B
WARNING: Retrying... context=artifacts-uploader error=invalid argument
ERROR: Job failed: execution took longer than 1h0m0s seconds