qcacld-3.0: Remove csr_is_concurrent_infra_connected()

Change I913b6e769f282a0f5a0ddb40e54d294ae07deb55 ("qcacld-3.0: Remove
unused concurrency ini parameters") removed the last client of
csr_is_concurrent_infra_connected().  Since it is obsolete, remove it.

Change-Id: Ibec4e93c2da7411544c491e08198b146074a1779
CRs-Fixed: 2371097
2 files changed