Revert "Fix Compile Warnings (#5963)"

This reverts commit b83e16dbdd.

Found regressions like auto orientation didn't work anymore after this change, revert it

src/admesh/connect.cpp

@@ -216,7 +216,7 @@ private:
 					// This is a match.  Record result in neighbors list.
 					match_neighbors(edge, *link->next);
 					// Delete the matched edge from the list.
-					// HashEdge *temp = link->next;
+					HashEdge *temp = link->next;
 					link->next = link->next->next;
 					// pool.destroy(temp);
 #ifndef NDEBUG

src/admesh/normals.cpp

@@ -193,7 +193,7 @@ void stl_fix_normal_directions(stl_file *stl)
         		norm_sw[facet_num] = 1; // Record this one as being fixed.
         		++ checked;
       		}
-      		// stl_normal *temp = head->next;	// Delete this facet from the list.
+      		stl_normal *temp = head->next;	// Delete this facet from the list.
       		head->next = head->next->next;
       		// pool.destroy(temp);
     	} else { // If we ran out of facets to fix: All of the facets in this part have been fixed.