misc: bh1770glc: remove unused array prox_curr_ma

Array prox_curr_ma is declared but never used, hence it is redundant
and can be removed.

Cleans up clang warning:
warning: 'prox_curr_ma' defined but not used [-Wunused-const-variable=]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/bh1770glc.c

@@ -180,9 +180,6 @@ static const char reg_vleds[] = "Vleds";
 static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2};
 static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500};
 
-/* Supported IR-led currents in mA */
-static const u8 prox_curr_ma[] = {5, 10, 20, 50, 100, 150, 200};
-
 /*
  * Supported stand alone rates in ms from chip data sheet
  * {100, 200, 500, 1000, 2000};