Remove unused code

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Clean up exception code [#66023630]

Signed-off-by: Tammer Saleh <tammer@pivotallabs.com>
Hide error_code, backtrace and message from API responses for unknown errors

[#66023630]

Signed-off-by: Tammer Saleh <tammer@pivotallabs.com>
Add column to store api error information

[#62361748]

Signed-off-by: Tammer Saleh <tammer@pivotallabs.com>
Hide error types when not returning an api or services error

[Finishes #66023630]