Remove pointless conditional

cmake/utils/set_output_dirs.cmake

@@ -13,11 +13,7 @@ function(set_output_dirs TARGET)
     foreach(CONFIG ${CONFIGS})
         string(TOUPPER ${CONFIG} CONFIG_UPPER)
 
-        if(ARG_SUBDIRECTORY)
-            set(OUT_DIR ${CMAKE_BINARY_DIR}/${CONFIG}/${ARG_SUBDIRECTORY})
-        else()
-            set(OUT_DIR ${CMAKE_BINARY_DIR}/${CONFIG})
-        endif()
+        set(OUT_DIR ${CMAKE_BINARY_DIR}/${CONFIG}/${ARG_SUBDIRECTORY})
 
         set_target_properties(${TARGET} PROPERTIES
             LIBRARY_OUTPUT_DIRECTORY_${CONFIG_UPPER} ${OUT_DIR}