Remove broken make constructs

$(ifeq) isn't a make function, so this will always return nothing. $(if
$(call streq,$(BRILLO),1),<true>,<false>) is what this was intended to
be, but since this hasn't been doing anything, and PRODUCT_PACKAGES_ENG
should be used instead, just remove these.

Bug: 72661763
Test: None
Change-Id: I982cbe548387e14fbb6b8162e76b019130077098