Revert last 4 commits

This reverts commits:
  5899c61ed2b4be3f02d0382d6fb0d1fc1bb7bc98
  e994d4535270b233c4ed5c62e0055fe20c9ab1c6
  eb20dec144765d255928fb3e0df960b09af5904d
  ebec0dd359eb3a3dc5dbf8ac533a7d89cfc72267
which wer accidentally pushed to master instead of a branch

1 files changed, 1 insertions, 46 deletions

diff --git a/gobject/gtype.c b/gobject/gtype.c
index 94b3667bc..b5ef2d11e 100644
--- a/gobject/gtype.c
+++ b/gobject/gtype.c
@@ -1689,51 +1689,6 @@ g_type_interface_prerequisites (GType  interface_type,
     }
 }
 
-/**
- * g_type_interface_instantiable_prerequisite:
- * @interface_type: an interface type
- *
- * Returns the instantiable prerequisite of an interface type.
- *
- * If the interface type has no instantiable prerequisite, 0 is returned.
- *
- * Since: 2.64
- *
- * Returns: the instantiable prerequisite type or 0 if none
- **/
-GType
-g_type_interface_instantiable_prerequisite (GType interface_type)
-{
-  TypeNode *inode = NULL;
-  TypeNode *iface;
-  guint i;
-
-  g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), G_TYPE_INVALID);
-
-  iface = lookup_type_node_I (interface_type);
-  if (iface == NULL)
-    return 0;
-
-  G_READ_LOCK (&type_rw_lock);
-
-  for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
-    {
-      GType prerequisite = IFACE_NODE_PREREQUISITES (iface)[i];
-      TypeNode *node = lookup_type_node_I (prerequisite);
-      if (node->is_instantiatable)
-        {
-          if (!inode || type_node_is_a_L (node, inode))
-            inode = node;
-        }
-    }
-
-  G_READ_UNLOCK (&type_rw_lock);
-
-  if (inode)
-    return NODE_TYPE (inode);
-  else
-    return 0;
-}
 
 static IFaceHolder*
 type_iface_peek_holder_L (TypeNode *iface,
@@ -3452,7 +3407,7 @@ g_type_depth (GType type)
  * @root_type: immediate parent of the returned type
  *
  * Given a @leaf_type and a @root_type which is contained in its
- * ancestry, return the type that @root_type is the immediate parent
+ * anchestry, return the type that @root_type is the immediate parent
  * of. In other words, this function determines the type that is
  * derived directly from @root_type which is also a base class of
  * @leaf_type.  Given a root type and a leaf type, this function can