qcacld-3.0: Remove ol_get_fw_files() prototype

Change I2c217891d0ca4b503e7388b3ebe2f787e8325af5 ("qcacld-3.0: Add
firmware download support for sdio bus (Part 5 - HIF SDIO)") added a
prototype for ol_get_fw_files() but did not add an implementation.
Since nothing uses this prototype, remove it.

Change-Id: Ie3b9aee767e14acc425ca7c365d10cbb73682fb5
CRs-Fixed: 2366957

core/bmi/inc/ol_fw.h

@@ -38,7 +38,6 @@
 void ol_target_failure(void *instance, QDF_STATUS status);
 
 void ol_target_ready(struct hif_opaque_softc *scn, void *cfg_ctx);
-QDF_STATUS ol_get_fw_files(struct ol_context *ol_ctx);
 QDF_STATUS ol_extra_initialization(struct ol_context *ol_ctx);
 #else /* WLAN_FEATURE_BMI */
 static inline void ol_target_failure(void *instance, QDF_STATUS status) {}