[MM-49751] - Turn off Inactive Server Email (#22648)

* [MM-49751] - Turn off Inactive Server Email

* remove unused var

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Co-authored-by: Mattermost Build <build@mattermost.com>

server/tests/test-config.json

@@ -167,7 +167,6 @@
         "LoginButtonColor": "",
         "LoginButtonBorderColor": "",
         "LoginButtonTextColor": "",
-        "EnableInactivityEmail": true
     },
     "RateLimitSettings": {
         "Enable": false,