chromeos_camera: Remove VAAPI image decoder tests

Currently, the VA-API image decoder unittests for JPEG and WebPs are
piggybacking on mjpeg_decode_accelerator_unittest.cc. This CL removes
these tests from mjpeg_decode_accelerator_unittest's binary.

Note that we do not lose the VA-API image decoder unittests coverage
since they now have their own binary [1][2]

[1] https://crrev.com/c/1881631
[2] https://crrev.com/c/1913488

Bug: 986074
Test: Existing test runs and passes locally on an Eve.
Change-Id: I76e4308cb73b6cf89a468d003c0abe263336a005
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1946708Reviewed-by: Andres Calderon Jaramillo <andrescj@chromium.org>
Reviewed-by: Miguel Casas <mcasas@chromium.org>
Commit-Queue: Gil Dekel <gildekel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720812}

components/chromeos_camera/BUILD.gn

@@ -186,6 +186,9 @@ if (use_v4l2_codec || use_vaapi) {
     if (use_vaapi) {
       deps += [ "//media/gpu/vaapi" ]
     }
+
+    # TODO(crbug.com/1029942): consider removing use_x11 support here. This is
+    # no longer needed.
     if (use_x11) {
       deps += [ "//ui/gfx/x" ]
     }
@@ -234,24 +237,13 @@ test("jpeg_decode_accelerator_unittest") {
   ]
   data = [
     "//media/test/data/peach_pi-1280x720.jpg",
-    "//media/test/data/peach_pi-40x23.jpg",
-    "//media/test/data/peach_pi-41x22.jpg",
-    "//media/test/data/peach_pi-41x23.jpg",
   ]
   if (use_vaapi) {
-    deps += [
-      "//media/gpu/vaapi",
-      "//media/gpu/vaapi:jpeg_decoder_unit_test",
-
-      # TODO(crbug.com/986074): we should move this to its own executable, but
-      # this would imply creating a new Tast wrapper in Chrome OS. So, for
-      # convenience, we make the WebP tests run with the
-      # jpeg_decode_accelerator_unittest binary.
-      "//media/gpu/vaapi:webp_decoder_unit_test",
-    ]
-
-    data += [ "//media/test/data/pixel-1280x720.jpg" ]
+    deps += [ "//media/gpu/vaapi" ]
   }
+
+  # TODO(crbug.com/1029942): consider removing use_x11 support here. This is no
+  # longer needed.
   if (use_x11) {
     deps += [ "//ui/gfx/x" ]
   }