Revert "retry on serialization errors"

vendor/github.com/lib/pq/ssl_permissions.go

@@ -1,20 +0,0 @@
-// +build !windows
-
-package pq
-
-import "os"
-
-// sslKeyPermissions checks the permissions on user-supplied ssl key files.
-// The key file should have very little access.
-//
-// libpq does not check key file permissions on Windows.
-func sslKeyPermissions(sslkey string) error {
-	info, err := os.Stat(sslkey)
-	if err != nil {
-		return err
-	}
-	if info.Mode().Perm()&0077 != 0 {
-		return ErrSSLKeyHasWorldPermissions
-	}
-	return nil
-}