Don't export Boost as a dependency of LSL::lsl

Boost is only ever a header-only, PRIVATE compile-time dependency of
lslobj (via the lslboost interface target), whether bundled or system-
provided. Since lslobj is linked into lsl only through
$<BUILD_INTERFACE:lslobj>, this dependency never reaches lsl's
exported link interface, so it doesn't belong in lsllinklibs, and the
installed LSLConfig.cmake doesn't need find_dependency(Boost) either.

Author: myd7349

cmake/Dependencies.cmake

@@ -89,10 +89,6 @@ if(NOT LSL_PUGIXML_IS_FETCHED)
     endif()
 endif()
 
-if(NOT LSL_BUNDLED_BOOST)
-    list(APPEND lsllinklibs Boost::boost Boost::disable_autolinking)
-endif()
-
 if(MINGW)
     list(APPEND lsllinklibs bcrypt)
 endif()

cmake/LSLConfig.cmake.in

@@ -4,10 +4,6 @@ include(CMakeFindDependencyMacro)
 
 find_dependency(Threads)
 
-if(NOT @LSL_BUNDLED_BOOST@)
-    find_dependency(Boost)
-endif()
-
 if(NOT @LSL_FETCH_PUGIXML@)
     find_dependency(pugixml)
 endif()