Removed use of IsRunningOnIOS8OrLater

ios/net/cookies/cookie_store_ios.mm

Index: ios/net/cookies/cookie_store_ios.mm
diff --git a/ios/net/cookies/cookie_store_ios.mm b/ios/net/cookies/cookie_store_ios.mm
index 2767aa2029ef060e1928bd18e195596f236eaf8a..c6a5024b7d6d6ab877c32070516518dd21a611ae 100644
--- a/ios/net/cookies/cookie_store_ios.mm
+++ b/ios/net/cookies/cookie_store_ios.mm
@@ -121,11 +121,8 @@ base::FilePath GetBinaryCookiesFilePath() {
 // Clears all cookies from the .binarycookies file.
 // Must be called from a thread where IO operations are allowed.
 // Preconditions: There must be no active WKWebViews present in the app.
+// Note that the .binarycookies file is present only on iOS8+.
 void ClearAllCookiesFromBinaryCookiesFile() {
-  // The .binarycookies file is present only on iOS8+.
-  if (!base::ios::IsRunningOnIOS8OrLater()) {
-    return;
-  }
   base::FilePath path = GetBinaryCookiesFilePath();
   if (base::PathExists(path)) {
     bool success = base::DeleteFile(path, false);