Drop obsolete 'mobileTargets' from module declarations

Quoth Mr. Mobile Web:

<ori-l> jdlrobson: what's the deal with 'mobileTargets'? I can remove those now, right?
<jdlrobson> ori-l: mobileTargets are dead yes
<jdlrobson> they are harmless but do nothing

Change-Id: I171f63b99904ae8ee47a25aad885c835bce41cf5