TUN-2243: Revert "STOR-519: Add db-connect, a SQL over HTTPS server"

This reverts commit 5da2109811.

vendor/github.com/kshvakov/clickhouse/tls_config.go

@@ -1,45 +0,0 @@
-package clickhouse
-
-import (
-	"crypto/tls"
-	"sync"
-)
-
-// Based on the original implementation in the project go-sql-driver/mysql:
-// https://github.com/go-sql-driver/mysql/blob/master/utils.go
-
-var (
-	tlsConfigLock     sync.RWMutex
-	tlsConfigRegistry map[string]*tls.Config
-)
-
-// RegisterTLSConfig registers a custom tls.Config to be used with sql.Open.
-func RegisterTLSConfig(key string, config *tls.Config) error {
-	tlsConfigLock.Lock()
-	if tlsConfigRegistry == nil {
-		tlsConfigRegistry = make(map[string]*tls.Config)
-	}
-
-	tlsConfigRegistry[key] = config
-	tlsConfigLock.Unlock()
-	return nil
-}
-
-// DeregisterTLSConfig removes the tls.Config associated with key.
-func DeregisterTLSConfig(key string) {
-	tlsConfigLock.Lock()
-	if tlsConfigRegistry != nil {
-		delete(tlsConfigRegistry, key)
-	}
-	tlsConfigLock.Unlock()
-}
-
-func getTLSConfigClone(key string) (config *tls.Config) {
-	tlsConfigLock.RLock()
-	if v, ok := tlsConfigRegistry[key]; ok {
-		config = v.Clone()
-	}
-	tlsConfigLock.RUnlock()
-	return
-}
-