Removed deprecated stuff in all.py

Author: Jean-Florent Raymond

src/sage/graphs/all.py

@@ -14,9 +14,6 @@
 import sage.graphs.partial_cube
 from . import graph_list as graphs_list
 lazy_import("sage.graphs", "graph_coloring")
-lazy_import("sage.graphs.cliquer", ['all_max_clique', 'max_clique',
-                                    'clique_number'],
-            deprecation=26200)
 from .graph_database import graph_db_info
 lazy_import("sage.graphs.graph_editor", "graph_editor")
 
@@ -35,15 +32,15 @@
 sage.graphs.cliquer are deprecated from the global namespace (:trac:`26200`)::
 
     sage: all_max_clique(Graph())
-    doctest:...: DeprecationWarning: Importing all_max_clique from here is deprecated. If you need to use it, please import it directly from sage.graphs.cliquer
-    See https://trac.sagemath.org/26200 for details.
-    [[]]
+    Traceback (most recent call last):
+    ...
+    NameError: name 'all_max_clique' is not defined
     sage: max_clique(Graph())
-    doctest:...: DeprecationWarning: Importing max_clique from here is deprecated. If you need to use it, please import it directly from sage.graphs.cliquer
-    See https://trac.sagemath.org/26200 for details.
-    []
+    Traceback (most recent call last):
+    ...
+    NameError: name 'max_clique' is not defined
     sage: clique_number(Graph())
-    doctest:...: DeprecationWarning: Importing clique_number from here is deprecated. If you need to use it, please import it directly from sage.graphs.cliquer
-    See https://trac.sagemath.org/26200 for details.
-    0
+    Traceback (most recent call last):
+    ...
+    NameError: name 'clique_number' is not defined
 """