net: qualcomm: rmnet: Remove the average computations

The average bytes and packets entries were for debug only and are
not needed any longer.

CRs-Fixed: 2361004
Change-Id: I15f7a5ef26b7b06496fc2b7d2a57453a8efc36d3
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>