doc: delete chakra tt from diagnostic tooling support tiers

PR-URL: nodejs/node#42627
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

doc/contributing/diagnostic-tooling-support-tiers.md

@@ -134,7 +134,6 @@ The tools are currently assigned to Tiers as follows:
 | Debugger  | Command line Debug Client | ?                             | Yes                     | 1           |
 | Debugger  | llnode                    | ?                             | No                      | 2           |
 | Debugger  | Chrome Dev tools          | ?                             | No                      | 3           |
-| Debugger  | Chakracore - time-travel  | No                            | Data source only        | too early   |
 | Tracing   | trace\_events (API)       | No                            | Yes                     | 1           |
 | Tracing   | trace\_gc                 | No                            | Yes                     | 1           |
 | Tracing   | DTrace                    | No                            | Partial                 | 3           |