common: Clean up debug packages

As of Q, micro_bench is dead. The rest are already part
of PRODUCT_PACKAGES_DEBUG in the main base_system.mk.

Change-Id: Idc91e572e83d227652802bbc8da71238596d28ea

config/common.mk

@@ -231,10 +231,7 @@ PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
 
 # These packages are excluded from user builds
 PRODUCT_PACKAGES_DEBUG += \
-    micro_bench \
-    procmem \
-    procrank \
-    strace
+    procmem
 
 # Conditionally build in su
 ifneq ($(TARGET_BUILD_VARIANT),user)