Remove a duplicate qCWarning(SHELL)

355124b2 (master branch) upper-cased the
first letter of this warning. bda72ef1
(branch 5.1) switched from qWarning() to qCWarning(SHELL).
33f15abf merged 5.1 into master, but
ended up including two almost identical warnings. This commit removes
the warning that starts with a lower-case letter.
1 job for !158 with remove-duplicate-qcwarning in 60 minutes and 10 seconds (queued for 58 minutes and 25 seconds)
detached
Status Job ID Name Coverage
  Build
failed #65342
linux kf5-qt5 qt5.12

01:00:10

 
Name Stage Failure
failed
linux kf5-qt5 qt5.12 Build The script exceeded the maximum execution time set for the job
qt.qpa.events: Event | XCB_PROPERTY_NOTIFY(28) | sequence: 400
qt.qpa.events: Event | XCB_PROPERTY_NOTIFY(28) | sequence: 400
qt.qpa.events: Event | XCB_PROPERTY_NOTIFY(28) | sequence: 400
qt.qpa.events: Event | XCB_ENTER_NOTIFY(7) | sequence: 400
qt.qpa.events: Event | XCB_PROPERTY_NOTIFY(28) | sequence: 400
qt.qpa.events: Event | XCB_PROPERTY_NOTIFY(28) | sequence: 400
Uploading artifacts for failed job
Pulling docker image gitlab/gitlab-runner-helper:x86_64-738bbe5a ...
ERROR: Job failed: execution took longer than 1h0m0s seconds