Revert "[MM-37984] Allow Desktop App to authenticate via external providers outside of the app on supported servers (#23795)" (#24039)

This reverts commit abdf4e58c3.

server/channels/db/migrations/postgres/000110_create_desktop_tokens.down.sql

@@ -1 +0,0 @@
-DROP TABLE IF EXISTS desktoptokens;

server/channels/db/migrations/postgres/000110_create_desktop_tokens.up.sql

@@ -1,8 +0,0 @@
-CREATE TABLE IF NOT EXISTS desktoptokens (
-    desktoptoken VARCHAR(64) NOT NULL,
-    userid VARCHAR(26),
-    createat BIGINT NOT NULL,
-    PRIMARY KEY (desktoptoken)
-);
-
-CREATE INDEX IF NOT EXISTS idx_desktoptokens_createat ON desktoptokens(createat);