Revert of Run gl_unittests with Ozone X11.

ui/gl/BUILD.gn

Index: ui/gl/BUILD.gn
diff --git a/ui/gl/BUILD.gn b/ui/gl/BUILD.gn
index df83289be89ddaf0718d301d209e6d8f6e3372e4..69262b487beae6ba61cf145e783b4455e2846df5 100644
--- a/ui/gl/BUILD.gn
+++ b/ui/gl/BUILD.gn
@@ -404,22 +404,6 @@
   ]
 }
 
-group("gl_unittests_ozonex") {
-  testonly = true
-  data_deps = [
-    ":gl_unittests",
-  ]
-}
-
-# TODO(GYP_GONE): Delete this after we've converted everything to GN.
-# The _run targets exist only for compatibility w/ GYP.
-group("gl_unittests_ozonex_run") {
-  testonly = true
-  deps = [
-    ":gl_unittests_ozonex",
-  ]
-}
-
 if (is_android) {
   generate_jar_jni("surface_jni_headers") {
     jni_package = "ui/gl"