Bug 1424528 part 4 - Remove the nsDidReflowStatus enum type. r=dholbert

MozReview-Commit-ID: 3QFWSlQ84fF

layout/generic/nsIFrame.h

@@ -390,14 +390,6 @@ operator<<(std::ostream& aStream, const nsReflowStatus& aStatus);
 
 //----------------------------------------------------------------------
 
-/**
- * DidReflow status values.
- */
-enum class nsDidReflowStatus : uint32_t {
-  NOT_FINISHED,
-  FINISHED
-};
-
 /**
  * When there is no scrollable overflow rect, the visual overflow rect
  * may be stored as four 1-byte deltas each strictly LESS THAN 0xff, for