refactor: quantity cration helpers are not opt-out rather than opt-in

Resolves #277

test/unit_test/runtime/CMakeLists.txt

@@ -35,11 +35,6 @@ target_link_libraries(unit_tests_runtime PRIVATE
     mp-units::mp-units
     Catch2::Catch2
 )
-target_compile_definitions(unit_tests_runtime PRIVATE
-    UNITS_REFERENCES
-    UNITS_LITERALS
-    UNITS_ALIASES
-)
 
 if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
     target_compile_options(unit_tests_runtime PRIVATE

test/unit_test/static/CMakeLists.txt

@@ -37,11 +37,6 @@ target_link_libraries(unit_tests_static_truncating PRIVATE
 target_compile_options(unit_tests_static_truncating PRIVATE
     $<IF:$<CXX_COMPILER_ID:MSVC>,/wd4242 /wd4244,-Wno-conversion>
 )
-target_compile_definitions(unit_tests_static_truncating PRIVATE
-    UNITS_REFERENCES
-    UNITS_LITERALS
-    UNITS_ALIASES
-)
 
 add_library(unit_tests_static
     cgs_test.cpp
@@ -78,8 +73,3 @@ target_link_libraries(unit_tests_static PRIVATE
     unit_tests_static_truncating
     mp-units::mp-units
 )
-target_compile_definitions(unit_tests_static PRIVATE
-    UNITS_REFERENCES
-    UNITS_LITERALS
-    UNITS_ALIASES
-)