sm6225-common: Drop libagmmixer

- This is debug target

Change-Id: I82404373e30db1db98662b8ce029a7f9dfbb03fc
Signed-off-by: ReStranger <restranger@disroot.org>
diff --git a/common.mk b/common.mk
index 3250162..c30ace5 100644
--- a/common.mk
+++ b/common.mk
@@ -57,7 +57,6 @@
     lib_bt_aptx \
     lib_bt_ble \
     lib_bt_bundle \
-    libagmmixer \
     libagmclient \
     libagm_compress_plugin \
     libagm_mixer_plugin \