Error occurred in deployment step 'Uninstall app for SharePoint': The System Account cannot perform this action

- Create a new account.

- Add this account to local admin.

- Then add the account to farm admin group. Open sharepoint central administration, go to Security. From there select Manage the farm administrators group.

- Now open visual studio into different user ( Shift + Right Click, and open with different user ). and put the user which you have created now.