Revert "connection: interpolate json.RawMessage as string (go-sql-driver#1058)"

This reverts commit c4f1976.

Author: bitcoinbarron2

AUTHORS

@@ -13,7 +13,6 @@
 
 Aaron Hopkins <go-sql-driver at die.net>
 Achille Roussel <achille.roussel at gmail.com>
-Alex Snast <alexsn at fb.com>
 Alexey Palazhchenko <alexey.palazhchenko at gmail.com>
 Andrew Reid <andrew.reid at tixtrack.com>
 Arne Hormann <arnehormann at gmail.com>

connection.go

@@ -12,7 +12,6 @@ import (
 	"context"
 	"database/sql"
 	"database/sql/driver"
-	"encoding/json"
 	"io"
 	"net"
 	"strconv"
@@ -272,14 +271,6 @@ func (mc *mysqlConn) interpolateParams(query string, args []driver.Value) (strin
 				}
 				buf = append(buf, '\'')
 			}
-		case json.RawMessage:
-			buf = append(buf, '\'')
-			if mc.status&statusNoBackslashEscapes == 0 {
-				buf = escapeBytesBackslash(buf, v)
-			} else {
-				buf = escapeBytesQuotes(buf, v)
-			}
-			buf = append(buf, '\'')
 		case []byte:
 			if v == nil {
 				buf = append(buf, "NULL"...)

connection_test.go

@@ -11,7 +11,6 @@ package mysql
 import (
 	"context"
 	"database/sql/driver"
-	"encoding/json"
 	"errors"
 	"net"
 	"testing"
@@ -37,33 +36,6 @@ func TestInterpolateParams(t *testing.T) {
 	}
 }
 
-func TestInterpolateParamsJSONRawMessage(t *testing.T) {
-	mc := &mysqlConn{
-		buf:              newBuffer(nil),
-		maxAllowedPacket: maxPacketSize,
-		cfg: &Config{
-			InterpolateParams: true,
-		},
-	}
-
-	buf, err := json.Marshal(struct {
-		Value int `json:"value"`
-	}{Value: 42})
-	if err != nil {
-		t.Errorf("Expected err=nil, got %#v", err)
-		return
-	}
-	q, err := mc.interpolateParams("SELECT ?", []driver.Value{json.RawMessage(buf)})
-	if err != nil {
-		t.Errorf("Expected err=nil, got %#v", err)
-		return
-	}
-	expected := `SELECT '{\"value\":42}'`
-	if q != expected {
-		t.Errorf("Expected: %q\nGot: %q", expected, q)
-	}
-}
-
 func TestInterpolateParamsTooManyPlaceholders(t *testing.T) {
 	mc := &mysqlConn{
 		buf:              newBuffer(nil),