Remove Windows support from the EDK.

mojo/edk/system/test_utils.cc

Index: mojo/edk/system/test_utils.cc
diff --git a/mojo/edk/system/test_utils.cc b/mojo/edk/system/test_utils.cc
index 5d78b15522b45923c2669a41e12eadcc0662b547..e25adc9a06713c6f130ac08d638eb0103a5cad7e 100644
--- a/mojo/edk/system/test_utils.cc
+++ b/mojo/edk/system/test_utils.cc
@@ -23,15 +23,11 @@ MojoDeadline DeadlineFromMilliseconds(unsigned milliseconds) {
 }
 
 MojoDeadline EpsilonDeadline() {
-// Originally, our epsilon timeout was 10 ms, which was mostly fine but flaky on
-// some Windows bots. I don't recall ever seeing flakes on other bots. At 30 ms
-// tests seem reliable on Windows bots, but not at 25 ms. We'd like this timeout
-// to be as small as possible (see the description in the .h file).
-//
 // Currently, |tiny_timeout()| is usually 100 ms (possibly scaled under ASAN,
-// etc.). Based on this, set it to (usually be) 30 ms on Windows and 20 ms
-// elsewhere.
-#if defined(OS_WIN) || defined(OS_ANDROID)
+// etc.). Based on this, set it to (usually be) 30 ms on Android and 20 ms
+// elsewhere. (We'd like this to be as small as possible, without making things
+// flaky)
+#if defined(OS_ANDROID)
   return (TinyDeadline() * 3) / 10;
 #else
   return (TinyDeadline() * 2) / 10;