nu-cli: Remove crates not needed. (#3716)

crates/nu-command/tests/main.rs

@@ -1,5 +1,18 @@
-extern crate nu_command;
-extern crate nu_test_support;
+use quickcheck_macros::quickcheck;
 
 mod commands;
 mod format_conversions;
+
+use nu_engine::EvaluationContext;
+
+#[quickcheck]
+fn quickcheck_parse(data: String) -> bool {
+    let (tokens, err) = nu_parser::lex(&data, 0, nu_parser::NewlineMode::Normal);
+    let (lite_block, err2) = nu_parser::parse_block(tokens);
+
+    if err.is_none() && err2.is_none() {
+        let context = EvaluationContext::basic();
+        let _ = nu_parser::classify_block(&lite_block, &context.scope);
+    }
+    true
+}