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/mysql/000110_create_desktop_tokens.down.sql

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

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

@@ -1,21 +0,0 @@
-CREATE TABLE IF NOT EXISTS DesktopTokens (
-    DesktopToken varchar(64) NOT NULL,
-    UserId varchar(26) NULL,
-    CreateAt bigint NOT NULL,
-    PRIMARY KEY (DesktopToken)
-);
-
-SET @preparedStatement = (SELECT IF(
-    (
-        SELECT COUNT(*) FROM INFORMATION_SCHEMA.STATISTICS
-        WHERE table_name = 'DesktopTokens'
-        AND table_schema = DATABASE()
-        AND index_name = 'idx_desktoptokens_createat'
-    ) > 0,
-    'SELECT 1',
-    'CREATE INDEX idx_desktoptokens_createat ON DesktopTokens(CreateAt);'
-));
-
-PREPARE createIndexIfNotExists FROM @preparedStatement;
-EXECUTE createIndexIfNotExists;
-DEALLOCATE PREPARE createIndexIfNotExists;