Fixing "error: syntax error at or near ")""

When trying to insert values containing the character `)`, the RegEx is not modifying the string properly, throwing this error message: `error: syntax error at or near ")"`.

Here's an example:

Initial value:
`VALUES ( \'Current Generator(s)\',\'CurrentGenerators__c\',NULL,NULL,\'Lead\',\'2014-12-10 22:31:24.076 +00:00\',\'2014-12-10 22:31:24.076 +00:00\');`

Current result:
`SELECT \'Current Generator(s\',\'CurrentGenerators__c\',NULL,NULL,\'Lead\',\'2014-12-10 22:31:24.076 +00:00\',\'2014-12-10 22:31:24.076 +00:00\');`

Expected result:
`SELECT \'Current Generator(s)\',\'CurrentGenerators__c\',NULL,NULL,\'Lead\',\'2014-12-10 22:31:24.076 +00:00\',\'2014-12-10 22:31:24.076 +00:00\';`

This commit is removing the `replace()` method called. After reading the blog post referred, there's no explanation of why this need to be replaced - and it is working fine without it.
Merge pull request #2720 from jpmonette/master

Fixing "error: syntax error at or near ")"" when using upsert with postgres dialect