* Remove ancient Fix tests.

testpkgs/args/args-build.sh

testpkgs/args/args.fix

testpkgs/fun/fun1.fix

testpkgs/fun/fun2.fix

testpkgs/fun/fun3.fix

testpkgs/infrec/infrec.fix

testpkgs/slow/slow-build.sh

testpkgs/slow/slow.fix

testpkgs/slow2/slow-build.sh

testpkgs/slow2/slow.fix

tests/Makefile.am

tests/lang.sh

tests/lang/eval-fail-blackhole.nix

tests/lang/eval-okay-let.exp

tests/lang/eval-okay-let.nix

tests/lang/eval-okay-map.exp

tests/lang/eval-okay-map.nix

tests/lang/eval-okay-scope-1.exp

tests/lang/eval-okay-scope-1.nix

tests/lang/eval-okay-scope-2.exp