In case you ever have to remove a faulty web part from a page , add the following to the end of the page url
Sometimes a web part can cause a page to break inside SharePoint. This is usualy caused by either code errors inside the web part or duplicate web parts added to the page. If this do happen you might receive "Object reference not set to an instance of an object" error Solution
In order to rectify the issue you need to remove the duplicate or faulty web part in order to successfully load the page. To achive this you must add "?contents=1" to the end of the page url(Example : http://mysiteurl/SitePages/home.aspx?contents=1) , this will give you option for the page where you can close,reset and delete web parts.
Select the suspect web part by ticking the selection box next to the Web Part Title. Click on "Delete" to remove the web part from the page.