Removing unused sts v2 dependency

[vaisharma]

Description of changes:
The sts V2 dependency is not needed for the package. So removing it.

[sayantacC]

I think this change is not safe. If I remember correctly, the v2 sts and sso dependencies are needed at runtime if an aws profile is used that depends on a role or single signon credential. The v2 sdk which is used to load the profile based credentials tries lazy loading them from the classpath at runtime. So, we need to still have the v2 sts and sso dependencies.