Revert "Transitively link static libs as well"

This reverts commit 7f6ea7e4ef95063471b4037fc7614bcf15e59864.

cpp/CMakeLists.txt

@@ -808,7 +808,7 @@ endif()
 ############################################################
 
 set(ARROW_LINK_LIBS
-)
+    ${BOOST_REGEX_LIBRARY})
 
 set(ARROW_PRIVATE_LINK_LIBS
 )
@@ -842,8 +842,7 @@ endif()
 ADD_ARROW_LIB(arrow
   SOURCES ${ARROW_SRCS}
   SHARED_LINK_FLAGS ${ARROW_SHARED_LINK_FLAGS}
-  SHARED_LINK_LIBS ${BOOST_SHARED_REGEX_LIBRARY}
-  STATIC_LINK_LIBS ${BOOST_STATIC_REGEX_LIBRARY}
+  SHARED_LINK_LIBS ${ARROW_LINK_LIBS}
 )
 
 add_subdirectory(src/arrow)