clk: mediatek: remove unused array audio_parents

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

Cleans up clang warning:
warning: 'audio_parents' defined but not used [-Wunused-const-variable=]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mediatek/clk-mt2701.c

@@ -249,11 +249,6 @@ static const char * const msdc30_parents[] = {
 	"univpll2_d4"
 };
 
-static const char * const audio_parents[] = {
-	"clk26m",
-	"syspll1_d16"
-};
-
 static const char * const aud_intbus_parents[] = {
 	"clk26m",
 	"syspll1_d4",