Bug 1387143 part 6. Remove some unused constants from nsISelectionPrivate and Selection. r=mats

dom/base/nsISelectionPrivate.idl

@@ -31,9 +31,6 @@ native ScrollAxis(nsIPresShell::ScrollAxis);
 [uuid(0c9f4f74-ee7e-4fe9-be6b-0ba856368178)]
 interface nsISelectionPrivate : nsISupports
 {
-    const short ENDOFPRECEDINGLINE=0;
-    const short STARTOFNEXTLINE=1;
-
     attribute boolean interlinePosition;
     [noscript] attribute nsIContent ancestorLimiter;
 

dom/webidl/Selection.webidl

@@ -79,11 +79,6 @@ partial interface Selection {
 // Additional chrome-only methods from nsISelectionPrivate
 interface nsISelectionListener;
 partial interface Selection {
-  [ChromeOnly]
-  const short ENDOFPRECEDINGLINE = 0;
-  [ChromeOnly]
-  const short STARTOFNEXTLINE = 1;
-
   [ChromeOnly,Throws]
   attribute boolean interlinePosition;