[cmake] boost set in one place and removed unreachable code

CMakeLists.txt

@@ -45,20 +45,6 @@ endif(USE_PCH)
 
 list( APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/libraries/fc/CMakeModules" )
 
-SET(BOOST_COMPONENTS)
-LIST(APPEND BOOST_COMPONENTS thread
-                             date_time
-                             system
-                             filesystem
-                             program_options
-                             signals
-                             serialization
-                             chrono
-                             unit_test_framework
-                             context
-                             locale)
-SET( Boost_USE_STATIC_LIBS ON CACHE STRING "ON or OFF" )
-
 if(UNIX)
   if(APPLE)
     set(whole_archive_flag "-force_load")
@@ -72,20 +58,24 @@ else()
   set(no_whole_archive_flag "--no-whole-archive")
 endif()
 
+SET( Boost_USE_STATIC_LIBS ON CACHE STRING "ON or OFF" )
 IF( WIN32 )
   SET(BOOST_ROOT $ENV{BOOST_ROOT})
   set(Boost_USE_MULTITHREADED ON)
   set(BOOST_ALL_DYN_LINK OFF) # force dynamic linking for all libraries
 ENDIF(WIN32)
-
-FIND_PACKAGE(Boost 1.64 REQUIRED COMPONENTS ${BOOST_COMPONENTS})
-# For Boost 1.53 on windows, coroutine was not in BOOST_LIBRARYDIR and do not need it to build,  but if boost versin >= 1.54, find coroutine otherwise will cause link errors
-IF(NOT "${Boost_VERSION}" MATCHES "1.53(.*)")
-   SET(BOOST_LIBRARIES_TEMP ${Boost_LIBRARIES})
-   FIND_PACKAGE(Boost 1.54 REQUIRED COMPONENTS coroutine)
-   LIST(APPEND BOOST_COMPONENTS coroutine)
-   SET(Boost_LIBRARIES ${BOOST_LIBRARIES_TEMP} ${Boost_LIBRARIES})
-ENDIF()
+FIND_PACKAGE(Boost 1.64 REQUIRED COMPONENTS
+    thread
+    date_time
+    system
+    filesystem
+    program_options
+    signals
+    serialization
+    chrono
+    unit_test_framework
+    context
+    locale)
 
 if( WIN32 )