Review

### remove patch from makedepends
* patch is in base-devel
* The group base-devel is assumed to be already installed when building with makepkg. Members of "base-devel" should not be included in makedepends arrays.
* https://wiki.archlinux.org/index.php/Pkgbuild#makedepends

### remove python2 from makedepends
* python2 is a dependency of python2-setuptools.  It is redundant to list it again.
* You do not need to list packages that your software depends on if other packages your software depends on already have those packages listed in their dependency.
* https://wiki.archlinux.org/index.php/Pkgbuild#depends

### more simple find/delete command
* just because