Remove old "acceptance tests"

test/README.md

@@ -1,40 +1,4 @@
-# Acceptance Testing
+# Test Utilities
 
-This directory contains an acceptance test suite for ghostty. This works
-by running the terminal emulator within a windowing environment, capturing a
-screenshot, and comparing results. We use this to visually verify that
-all rendering conforms to what we expect.
-
-This test suite can also execute alternate terminal emulators so that we
-can easily compare outputs between them.
-
-## Running a Single Test
-
-To run a single test, use the `run-host.sh` script. This must be executed
-from this directory. Example:
-
-```shell-session
-$ ./run-host.sh --exec xterm --case /src/cases/vttest/launch.sh
-```
-
-The `--case` flag uses `/src` as the root for this directory.
-
-The `--update` flag can be used to update the screenshot in place. This
-should be used to gather a new screenshot. If you want to compare to the old
-screenshot, copy the old one or use git to revert.
-
-## Running the Full Suite
-
-**Warning:** This can take a long time and isn't recommended. The CI
-environment automatically runs the full test suite and is the recommended
-approach.
-
-To run the full test suite against all terminal emulators, use the
-`run-all.sh` script. This optionally takes an `--exec` parameter to run
-the full test suite against only a single terminal emulator.
-
-## Modifying the `ghostty` Binary
-
-This test suite expects the `ghostty` binary to be in _this directory_.
-You can manually copy it into place. Each time you modify the binary, you
-must rebuild the Docker image.
+This directory contains anything related to testing Ghostty that doesn't
+fit within the standard Zig testing framework alongside the source.