Remove OS(WINCE) as blink and chromium does not support WinCe.

Source/wtf/RandomNumberSeed.h

Index: Source/wtf/RandomNumberSeed.h
diff --git a/Source/wtf/RandomNumberSeed.h b/Source/wtf/RandomNumberSeed.h
index 8462ca9072c0da908bbeb6236a561eccd76d8d36..f1d46c8f5a4decb35ac15a06b605864508661873 100644
--- a/Source/wtf/RandomNumberSeed.h
+++ b/Source/wtf/RandomNumberSeed.h
@@ -45,9 +45,6 @@ inline void initializeRandomNumberGenerator()
 {
 #if OS(DARWIN)
     // On Darwin we use arc4random which initialises itself.
-#elif OS(WINCE)
-    // initialize rand()
-    srand(GetTickCount());
 #elif COMPILER(MSVC) && defined(_CRT_RAND_S)
     // On Windows we use rand_s which initialises itself
 #elif OS(UNIX)