Reduce duplicates, keeping uniques only

I have a table containing ten lines (each one a street). Each street has a name and a zone value. But there are some duplicate records…

Street_name                       Zone_name

St James Street                  Zone B

High Street                         Zone B

High Street                         Zone B

High Street                         Zone D

High Street                         Zone D

Acacia Avenue                   Zone B

Acacia Avenue                   Zone B

Acacia Avenue                   Zone B

Acacia Avenue                   Zone C

Acacia Avenue                   Zone C

How would I reduce these down to unique records only. So, I’d end up with this…

Street_name                       Zone_name

St James Street                  Zone B

High Street                         Zone B

High Street                         Zone D

Acacia Avenue                   Zone B

Acacia Avenue                   Zone C

Thanks,