Clearing Recently used coordinate reference systems using QGIS?

After using some non usual SRC for demonstration purpose, I wish to clear my "Recently used coordinate reference systems" list for the sake of praticity.

Is it possible?

I am using QGIS 2.10.1.

Answer

QGIS 2.x

Yes, you can enter the following code in the Python console to remove all Recently used coordinate reference systems from the user interface:

from PyQt4.QtCore import QSettings

QSettings().remove('UI/recentProjections')
QSettings().remove('UI/recentProjectionsAuthId')

Now I'm not sure why exactly but, for me atleast, using one remove method was not enough. I had to use both (the order does not matter either aslong as both are used).

But it works for me anyway and hopefully for you too!

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QGIS 3.x

You could use the following:

from PyQt5.QtCore import QSettings 
QSettings().remove('UI/recentProjections')

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Or to import QSettings generically (i.e. from differing major QGIS versions), you could use the following (thanks to @TeddyTedTed):

from qgis.PyQt.QtCore import QSettings