Remove New/Update/Remove MgUserAuthenticationMethod (#1401)

* Remove New/Update/Remove AuthenticationMethod

* Update src/Identity.SignIns/Identity.SignIns/readme.md

Co-authored-by: Peter Ombwa <[email protected]>

Co-authored-by: Peter Ombwa <[email protected]>
Co-authored-by: Peter Ombwa <[email protected]>

Author: andres-canello

src/Identity.SignIns/Identity.SignIns/readme.md

@@ -59,6 +59,10 @@ directive:
       verb: New|Update
       subject: ^UserAuthenticationPasswordMethod$
     remove: true
+  - where:
+      verb: New|Update|Remove
+      subject: ^UserAuthenticationMethod$
+    remove: true
 # Rename cmdlets
   - where:
       subject: ^(.*)(IdentityProtection)(.*)$