acc_json: internal lib srdb1 is not needed by the module

src/modules/acc_json/Makefile

@@ -24,6 +24,4 @@ endif
 
 DEFS+=-DKAMAILIO_MOD_INTERFACE
 
-SERLIBPATH=../../lib
-SER_LIBS+=$(SERLIBPATH)/srdb1/srdb1
 include ../../Makefile.modules