Remove wpa_supplicant_private_lib_event
from the mainline supplicant build rule.

Mainline supplicant should not depend on
any device-specific supplicant libraries.

Bug: 379466859
Bug: 365585450
Test: Make on target harriet-trunk_staging-userdebug
Change-Id: Iba773fd8920f6e7c5afad5a311a20f6152d05a72
diff --git a/wpa_supplicant/Android.bp b/wpa_supplicant/Android.bp
index 8160071..f66d45b 100644
--- a/wpa_supplicant/Android.bp
+++ b/wpa_supplicant/Android.bp
@@ -1016,9 +1016,6 @@
     }) + select(soong_config_variable("wpa_supplicant_8", "board_hostapd_config_80211w_mfp_optional"), {
         true: ["-DENABLE_HOSTAPD_CONFIG_80211W_MFP_OPTIONAL"],
         default: [],
-    }) + select(soong_config_variable("wpa_supplicant_8", "board_wpa_supplicant_private_lib_event"), {
-        true: ["-DANDROID_LIB_EVENT"],
-        default: [],
     }) + select(soong_config_variable("wpa_supplicant_8", "wifi_priv_cmd_update_mbo_cell_status"), {
         true: ["-DENABLE_PRIV_CMD_UPDATE_MBO_CELL_STATUS"],
         default: [],