[brief] Removes the functional header.

[detailed]
- The functionality is superseded by the new Range class, which offers
  much better functionality to the original iota function.

Author: marovira

include/zeus/CMakeLists.txt

@@ -7,7 +7,6 @@ set(ZEUS_HEADER_LIST
     ${ZEUS_VERSION_HEADER}
     ${ZEUS_SOURCE_ROOT}/zeus/assert.hpp
     ${ZEUS_SOURCE_ROOT}/zeus/float.hpp
-    ${ZEUS_SOURCE_ROOT}/zeus/functional.hpp
     ${ZEUS_SOURCE_ROOT}/zeus/platform.hpp
     ${ZEUS_SOURCE_ROOT}/zeus/timer.hpp
     ${ZEUS_SOURCE_ROOT}/zeus/filesystem.hpp

include/zeus/functional.hpp

@@ -1,7 +1,6 @@
 set(ZEUS_TEST_FILES
     ${ZEUS_TEST_ROOT}/assert_test.cpp
     ${ZEUS_TEST_ROOT}/float_test.cpp
-    ${ZEUS_TEST_ROOT}/functional_test.cpp
     ${ZEUS_TEST_ROOT}/platform_test.cpp
     ${ZEUS_TEST_ROOT}/timer_test.cpp
     ${ZEUS_TEST_ROOT}/filesystem_test.cpp