Remove com.android.mediadrm.signer.xml

The com.android.mediadrm.signer.xml is removed from the
PRODUCT_PACKAGES, because xml files will be generated and installed by
soong.

Bug:77577799
Test: make -j
Change-Id: Icd19b896c92b347e0452c5bfb21a331e727a4f08

target/product/core_minimal.mk

@@ -47,7 +47,6 @@ PRODUCT_PACKAGES += \
     com.android.media.remotedisplay \
     com.android.media.remotedisplay.xml \
     com.android.mediadrm.signer \
-    com.android.mediadrm.signer.xml \
     drmserver \
     ethernet-service \
     framework-res \