porting: rm store_ram_init from nimble_port_run()
porting: rm store_ram_init from nimble_port_run()

The ble_store_ram module is (i) deprecated and (ii) nowhere used in the
NimBLE code base, hence there is no need to intialize it.

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble