*/*: drop redundant CARGO_PROFILE_* variables, collapse newlines

The cargo vars are now set in abuild.conf by default.

Newlines done with:

    find . -name APKBUILD -exec sed -i '/^$/N;/^\n$/D' {} \;

See also: https://stackoverflow.com/a/4522043

testing/apache2-mod-perl/APKBUILD

@@ -29,7 +29,6 @@ check() {
 	make test
 }
 
-
 package() {
 	make DESTDIR="$pkgdir" install
 	find "$pkgdir" \( -name perllocal.pod -o -name .packlist \) -delete