build - remove evas-modules option as its rather pointless

build - remove evas-modules option as its rather pointless

evas-modules affects evas engine modules if they are static or shared,
but ecore evas modules are still modules... so all in all this doesnt
help much as it still requires modules to be separate from the shared
libs, thus disallowing for statically linking efl into an app anyway
etc. etc. etc. ... so less options to deal with, less complexity.
better.