Remove page on writing CAWG id assertions for now

Author: crandmck

docs/manifest/writing/cawg-id.md

@@ -7,5 +7,4 @@ Use a [ManifestDefinition](../json-ref/manifest-def.mdx) structure to define and
 
 - [Writing ingredients](ingredients.md)
 - [Writing assertions and actions](assertions-actions.md)
-- [Writing CAWG identity assersions](cawg-id.md)
 - [ManifestDefinition JSON reference](manifest/json-ref/manifest-def.mdx)

docs/manifest/writing/writing.md

@@ -75,10 +75,6 @@ const sidebars = {
               type: 'doc',
               id: 'manifest/writing/assertions-actions',
             },
-            {
-              type: 'doc',
-              id: 'manifest/writing/cawg-id',
-            },
             {
               type: 'doc',
               id: 'manifest/json-ref/manifest-def',