src/testdir/Makefile: do not delete files from patch (.rej/.orig) [ci skip]

[blueyed]

They are not generated by Vim / the tests.

(it was cleaning a bunch of .rej files when porting a Vim patch to
Neovim, which I often delete manually to see what needs to be done for a
patch still)

[brammool]

They are not generated by Vim / the tests. (it was cleaning a bunch of .rej files when porting a Vim patch to Neovim, which I often delete manually to see what needs to be done for a patch still)

That's the opposite of what I want: Tests may fail (in strange ways) if .rej or .orig files are laying around. Thus I rather make sure they are gone.

…

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[brammool]

Let's not include this. The "clean" target not only removes files created by the tests themselves, but also files that may result from working on the tests.