Remove SiteIsolationPolicy::IsSwappedOutStateForbidden().

content/common/site_isolation_policy.h

Index: content/common/site_isolation_policy.h
diff --git a/content/common/site_isolation_policy.h b/content/common/site_isolation_policy.h
index 69b6c5e4cf4603e036957fb47574fceb05e72321..5b1ee90b37f59daed519dac23360706f00458c59 100644
--- a/content/common/site_isolation_policy.h
+++ b/content/common/site_isolation_policy.h
@@ -43,17 +43,6 @@ class CONTENT_EXPORT SiteIsolationPolicy {
   // TODO(creis, avi): Make this the default, and eliminate this.
   static bool UseSubframeNavigationEntries();
 
-  // Returns true if we are currently in a mode where the swapped out state
-  // should not be used. Currently (as an implementation strategy) swapped out
-  // is forbidden under --site-per-process, but our goal is to eliminate the
-  // mode entirely. In code that deals with the swapped out state, prefer calls
-  // to this function over consulting the switches directly. It will be easier
-  // to grep, and easier to rip out.
-  //
-  // TODO(nasko): When swappedout:// is eliminated entirely, this function
-  // should be removed and its callers cleaned up.
-  static bool IsSwappedOutStateForbidden();
-
  private:
   SiteIsolationPolicy();  // Not instantiable.