internal/structures.h: Removed unused and badly writen constant marpaESLIF_alternative_default [ci skip]
internal/structures.h: Removed unused and badly writen constant marpaESLIF_alternative_default [ci skip]

jddurand/c-marpaESLIF,jddurand/c-marpaESLIF,jddurand/c-marpaESLIF,jddurand/c-marpaESLIF,jddurand/c-marpaESLIF