Remove unnecessary copying of common properties

The (Soc/Device/Product/System_ext)_specific are all properties in
ModuleBase.commonProperties. Initially, they were explicitly copied
from the parent to the child. Since then the CreateModule() method
was modified to automatically copy all the commonProperties from the
parent to the child so this code is no longer necessary.

Bug: 156618935
Test: m nothing
      checked that it does not change the generated xml permissions
	  file for a java_sdk_library that sets soc_specific: true and
	  is in the vendor partition.
Change-Id: I8c985b50cb6b6c019b33a4652de482ded689fee4