get rid of SPOT_DELETED

It was only needed with Swig versions older than what we have now.

* src/misc/common.hh: Here.
* src/misc/bitvect.hh, src/misc/common.hh, src/ta/taexplicit.hh,
src/ta/taproduct.hh, src/tl/simplify.hh, src/twa/bdddict.hh,
src/twa/taatgba.hh, src/twa/twaproduct.hh: Use = delete directly.

src/twa/bdddict.hh

@@ -309,8 +309,8 @@ namespace spot
 
   private:
     // Disallow copy.
-    bdd_dict(const bdd_dict& other) SPOT_DELETED;
-    bdd_dict& operator=(const bdd_dict& other) SPOT_DELETED;
+    bdd_dict(const bdd_dict& other) = delete;
+    bdd_dict& operator=(const bdd_dict& other) = delete;
   };
 
   typedef std::shared_ptr<bdd_dict> bdd_dict_ptr;

src/twa/taatgba.hh

@@ -70,8 +70,8 @@ namespace spot
 
   private:
     // Disallow copy.
-    taa_tgba(const taa_tgba& other) SPOT_DELETED;
-    taa_tgba& operator=(const taa_tgba& other) SPOT_DELETED;
+    taa_tgba(const taa_tgba& other) = delete;
+    taa_tgba& operator=(const taa_tgba& other) = delete;
   };
 
   /// Set of states deriving from spot::state.

src/twa/twaproduct.hh

@@ -114,8 +114,8 @@ namespace spot
 
   private:
     // Disallow copy.
-    twa_product(const twa_product&) SPOT_DELETED;
-    twa_product& operator=(const twa_product&) SPOT_DELETED;
+    twa_product(const twa_product&) = delete;
+    twa_product& operator=(const twa_product&) = delete;
   };
 
   /// \brief A lazy product with different initial states.