Remove broken clap versions from cargotest

treeify depends on an outdated version of clap, which will fail to compile
when we promote missing_fragment_specifier future compat lint to
error (ie, old clap contains code that shouldn't have compiled in the
first place).

Additionally, this crate seem tiny relative to other crates we are
testing here, so it seems like it doesn't provide that much additional
confidence.

The same happens with tokei project, but it is an actively maintained
one, so we can just upgrade it to a version from 2018, where clap was
upgraded.

src/tools/cargotest/main.rs

@@ -29,14 +29,7 @@ const TEST_REPOS: &'static [Test] = &[
     Test {
         name: "tokei",
         repo: "https://github.com/XAMPPRocky/tokei",
-        sha: "5e11c4852fe4aa086b0e4fe5885822fbe57ba928",
-        lock: None,
-        packages: &[],
-    },
-    Test {
-        name: "treeify",
-        repo: "https://github.com/dzamlo/treeify",
-        sha: "999001b223152441198f117a68fb81f57bc086dd",
+        sha: "a950ff128d5a435a8083b1c7577c0431f98360ca",
         lock: None,
         packages: &[],
     },