remove does-nothing.rs

fix: restore issues_entry_limit

src/tools/tidy/src/ui_tests.rs

@@ -18,7 +18,7 @@
 // FIXME: The following limits should be reduced eventually.
 
 const ISSUES_ENTRY_LIMIT: usize = 1722;
-const ROOT_ENTRY_LIMIT: usize = 861;
+const ROOT_ENTRY_LIMIT: usize = 859;
 
 const EXPECTED_TEST_FILE_EXTENSIONS: &[&str] = &[
     "rs",     // test source files

tests/ui/does-nothing.rs

@@ -1,2 +0,0 @@
-fn main() { println!("doing"); this_does_nothing_what_the; println!("boing"); }
-//~^ ERROR cannot find value `this_does_nothing_what_the` in this scope

tests/ui/does-nothing.stderr

@@ -1,9 +0,0 @@
-error[E0425]: cannot find value `this_does_nothing_what_the` in this scope
-  --> $DIR/does-nothing.rs:1:32
-   |
-LL | fn main() { println!("doing"); this_does_nothing_what_the; println!("boing"); }
-   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
-
-error: aborting due to 1 previous error
-
-For more information about this error, try `rustc --explain E0425`.