tests/ui: remove outdated README

We should consolidate our test suite docs in rustc-dev-guide, and this
README is very outdated.

1 files changed, 0 insertions, 35 deletions

diff --git a/tests/ui/README.md b/tests/ui/README.md
deleted file mode 100644
index aa36481ae06..00000000000
--- a/tests/ui/README.md
+++ /dev/null
@@ -1,35 +0,0 @@
-# UI Tests
-
-This folder contains `rustc`'s
-[UI tests](https://rustc-dev-guide.rust-lang.org/tests/ui.html).
-
-## Test Directives (Headers)
-
-Typically, a UI test will have some test directives / headers which are
-special comments that tell compiletest how to build and interpret a test.
-
-As part of an ongoing effort to rewrite compiletest
-(see <https://github.com/rust-lang/compiler-team/issues/536>), a major
-change proposal to change legacy compiletest-style headers `// <directive>`
-to [`ui_test`](https://github.com/oli-obk/ui_test)-style headers
-`//@ <directive>` was accepted (see
-<https://github.com/rust-lang/compiler-team/issues/512>.
-
-An example directive is `ignore-test`. In legacy compiletest style, the header
-would be written as
-
-```rs
-// ignore-test
-```
-
-but in `ui_test` style, the header would be written as
-
-```rs
-//@ ignore-test
-```
-
-compiletest is changed to accept only `//@` directives for UI tests
-(currently), and will reject and report an error if it encounters any
-comments `// <content>` that may be parsed as a legacy compiletest-style
-test header. To fix this, you should migrate to the `ui_test`-style header
-`//@ <content>`.