Remove fc's bz2 unused linkage

fc links to bz2 but this isn't required. Nothing uses bz2 and the HAS_BZIP2 macro that is set is not used anywhere. Remove this as it causes a runtime dependency that is 100% unneeded

libraries/fc/CMakeLists.txt

@@ -138,15 +138,6 @@ else()
   set( ZLIB_LIBRARIES "" )
 endif( ZLIB_FOUND )
 
-find_package( BZip2 )
-if( BZIP2_FOUND )
-   MESSAGE( STATUS "bzip2 found" )
-   add_definitions( -DHAS_BZIP2 )
-else()
-   MESSAGE( STATUS "bzip2 not found" )
-   set( BZIP2_LIBRARIES "" )
-endif( BZIP2_FOUND )
-
 # This will become unnecessary once we update to websocketpp which fixes upstream issue #395
 SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DWEBSOCKETPP_STRICT_MASKING")
 SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DBOOST_ASIO_HAS_STD_CHRONO")
@@ -162,7 +153,7 @@ target_include_directories(fc
 IF(NOT WIN32)
   set(LINK_USR_LOCAL_LIB -L/usr/local/lib)
 ENDIF()
-target_link_libraries( fc PUBLIC ${LINK_USR_LOCAL_LIB} ${Boost_LIBRARIES} ${OPENSSL_LIBRARIES} ${ZLIB_LIBRARIES} ${BZIP2_LIBRARIES} ${PLATFORM_SPECIFIC_LIBS} ${RPCRT4} ${CMAKE_DL_LIBS} ${rt_library} ${readline_libraries} ${ECC_LIB} )
+target_link_libraries( fc PUBLIC ${LINK_USR_LOCAL_LIB} ${Boost_LIBRARIES} ${OPENSSL_LIBRARIES} ${ZLIB_LIBRARIES} ${PLATFORM_SPECIFIC_LIBS} ${RPCRT4} ${CMAKE_DL_LIBS} ${rt_library} ${readline_libraries} ${ECC_LIB} )
 
 
 SET(OPENSSL_CONF_TARGET )