3813aff libre: qtcreator: remove unused libre.patch

Authored and Committed by Denis 'GNUtoo' Carikli 2 years ago
    libre: qtcreator: remove unused libre.patch
    
    The usage of the libre.patch has already been removed by the following
    commit:
        e0a236ce2aaf35673906212a7bcc3ab09ec71de6
        (libre: qtcreator: sync from core from 4.12.4-1 to 4.14.0-4)
    but in that commit I forgot to also remove the actual libre.patch file.
    
    Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>