Do not call setlocale() globally in CMake applications (#15377)

Revert the changes made by commit v3.1.0-rc1~406^2~1 (Encoding: Add
setlocale() to applications, 2014-05-30) and commit v3.1.0-rc1~406^2
(Encoding: Change to only set LC_CTYPE, 2014-06-11), and other setlocale
calls added later in their spirit.  CMake has not been taught how to
deal with non-C locales everywhere.  We do not define any functionality
for character conversions for non-ASCII strings.  Another solution will
be needed to address the original problem motivating addition of
setlocale() calls.

Source/CursesDialog/ccmake.cxx

@@ -16,7 +16,6 @@
 
 #include <signal.h>
 #include <sys/ioctl.h>
-#include <locale.h>
 
 #include "cmCursesMainForm.h"
 #include "cmCursesStandardIncludes.h"
@@ -95,8 +94,6 @@ void CMakeMessageHandler(const char* message, const char* title, bool&,
 
 int main(int argc, char const* const* argv)
 {
-  setlocale(LC_CTYPE, "");
-
   cmsys::Encoding::CommandLineArguments encoding_args =
     cmsys::Encoding::CommandLineArguments::Main(argc, argv);
   argc = encoding_args.argc();