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

This reverts commit 5da2109811.

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

@@ -1,47 +0,0 @@
-package clickhouse
-
-import (
-	"fmt"
-	"strings"
-)
-
-type Exception struct {
-	Code       int32
-	Name       string
-	Message    string
-	StackTrace string
-	nested     error
-}
-
-func (e *Exception) Error() string {
-	return fmt.Sprintf("code: %d, message: %s", e.Code, e.Message)
-}
-
-func (ch *clickhouse) exception() error {
-	defer ch.conn.Close()
-	var (
-		e         Exception
-		err       error
-		hasNested bool
-	)
-	if e.Code, err = ch.decoder.Int32(); err != nil {
-		return err
-	}
-	if e.Name, err = ch.decoder.String(); err != nil {
-		return err
-	}
-	if e.Message, err = ch.decoder.String(); err != nil {
-		return err
-	}
-	e.Message = strings.TrimSpace(strings.TrimPrefix(e.Message, e.Name+":"))
-	if e.StackTrace, err = ch.decoder.String(); err != nil {
-		return err
-	}
-	if hasNested, err = ch.decoder.Bool(); err != nil {
-		return err
-	}
-	if hasNested {
-		e.nested = ch.exception()
-	}
-	return &e
-}