ENH: Use edgeHashes.H and labelPairHashes.H

- avoids some duplicate code.

src/meshTools/searchableSurface/searchableSurfaces.H

@@ -63,9 +63,6 @@ class searchableSurfaces
         //- Region names per surface
         List<wordList> regionNames_;
 
-        ////- From global region name to surface and region on surface
-        //HashTable<labelPair> regionNames_;
-
         //- Indices of all surfaces. Precalculated and stored.
         labelList allSurfaces_;
 

src/meshTools/triSurface/booleanOps/surfaceIntersection/edgeIntersections.C

@@ -26,7 +26,6 @@ License
 #include "edgeIntersections.H"
 #include "triSurfaceSearch.H"
 #include "OFstream.H"
-#include "HashSet.H"
 #include "triSurface.H"
 #include "pointIndexHit.H"
 #include "treeDataTriSurface.H"

src/meshTools/triSurface/booleanOps/surfaceIntersection/surfaceIntersection.C

@@ -26,7 +26,7 @@ License
 #include "surfaceIntersection.H"
 #include "triSurfaceSearch.H"
 #include "OFstream.H"
-#include "HashSet.H"
+#include "labelPairHashes.H"
 #include "triSurface.H"
 #include "pointIndexHit.H"
 #include "mergePoints.H"