GenericSystem: Remove misspelled flag default

In CMakeGenericSystem, it should be ``CMAKE_INCLUDE_SEP_<LANG>`` and not
``CMAKE_INCLUDE_<LANG>_SEP``. However, if the flag is defined, include
behavior changes to Java-style non-repeating flags, which isn't
intended. Therefore, removing the (misspelled) default initialization
should help remove confusion and unintended side effects.

Modules/CMakeCXXInformation.cmake

@@ -158,10 +158,6 @@ if(NOT CMAKE_INCLUDE_FLAG_CXX)
   set(CMAKE_INCLUDE_FLAG_CXX ${CMAKE_INCLUDE_FLAG_C})
 endif()
 
-if(NOT CMAKE_INCLUDE_FLAG_SEP_CXX)
-  set(CMAKE_INCLUDE_FLAG_SEP_CXX ${CMAKE_INCLUDE_FLAG_SEP_C})
-endif()
-
 # for most systems a module is the same as a shared library
 # so unless the variable CMAKE_MODULE_EXISTS is set just
 # copy the values from the LIBRARY variables

Modules/CMakeFortranInformation.cmake

@@ -151,10 +151,6 @@ if(NOT CMAKE_INCLUDE_FLAG_Fortran)
   set(CMAKE_INCLUDE_FLAG_Fortran ${CMAKE_INCLUDE_FLAG_C})
 endif()
 
-if(NOT CMAKE_INCLUDE_FLAG_SEP_Fortran)
-  set(CMAKE_INCLUDE_FLAG_SEP_Fortran ${CMAKE_INCLUDE_FLAG_SEP_C})
-endif()
-
 set(CMAKE_VERBOSE_MAKEFILE FALSE CACHE BOOL "If this value is on, makefiles will be generated without the .SILENT directive, and all commands will be echoed to the console during the make.  This is useful for debugging only. With Visual Studio IDE projects all commands are done without /nologo.")
 
 set(CMAKE_Fortran_FLAGS_INIT "$ENV{FFLAGS} ${CMAKE_Fortran_FLAGS_INIT}")

Modules/CMakeGenericSystem.cmake

@@ -9,7 +9,6 @@ set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")         # +s, flag for exe link to use
 set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG "")       # -rpath
 set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP "")   # : or empty
 set(CMAKE_INCLUDE_FLAG_C "-I")       # -I
-set(CMAKE_INCLUDE_FLAG_C_SEP "")     # , or empty
 set(CMAKE_LIBRARY_PATH_FLAG "-L")
 set(CMAKE_LIBRARY_PATH_TERMINATOR "")  # for the Digital Mars D compiler the link paths have to be terminated with a "/"
 set(CMAKE_LINK_LIBRARY_FLAG "-l")