remove old GH refs

src/u_main.pas

@@ -3125,9 +3125,7 @@ begin
     end
     else
     begin
-      // back compat, see https://github.com/Basile-z/dexed/issues/276
       dmdproc.Parameters.Add('-version=runnable_module');
-
       dmdproc.Parameters.Add('-version=run_single_module');
     end;
 

src/u_messages.pas

@@ -1095,7 +1095,6 @@ begin
   if not openFileFromDmdMessage(msg) then
     exit;
 
-  // fixes strange bug : https://github.com/Basile-z/dexed/issues/320
   if (fDoc <> old) and fOptions.singleMessageClick and
     assigned(dat) and (dat^.ctxt = amcEdit) then
       List.ClearSelection(false);

src/u_stringrange.pas

@@ -18,11 +18,6 @@ type
    * Most of the operations can be chained because the functions
    * return either a pointer to a TStringRange (in this case this is always
    * the "Self") or a new TStringRange (in this case this is always a copy).
-   *
-   * This is based on a more generic work which tries to implement some kind
-   * of "D" ranges in Object Pascal (see https://github.com/Basile-z/ArrayOps).
-   * Even if Object Pascal doesn't provide the expressivness required to mimic
-   * D ranges, a few good stuff are still possible.
    *)
   TStringRange = record
   private