chore(Boost): Remove redundant Boost_USE_STATIC_LIBS=OFF setting

This setting was mistakenly added in MR !350 and is causing compilation
issues on MinGW (see #294). Furthermore, this option is redundant as we
already have an existing setting for controlling Boost library linkage.

CMakeLists.txt

@@ -89,7 +89,7 @@ include_directories( ${CMAKE_BINARY_DIR}/include )
 #-- BOOST --------------------------------------------------
 option( Boost_USE_AUTO_LINK "boost use autolink" OFF )
 set(Boost_USE_DEBUG_RUNTIME OFF)
-set(Boost_USE_STATIC_LIBS OFF)
+# set(Boost_USE_STATIC_LIBS OFF)
 option( Boost_USE_DEBUG_RUNTIME "Use Boost debug runtime" OFF )
 
 if( NOT ${Boost_USE_AUTO_LINK} )