Remove remaining hangul-related code

src/edit.c

@@ -6975,13 +6975,6 @@ ins_esc (
   static int disabled_redraw = FALSE;
 
   check_spell_redraw();
-# if defined(ESC_CHG_TO_ENG_MODE)
-  hangul_input_state_set(0);
-# endif
-  if (composing_hangul) {
-    push_raw_key(composing_hangul_buffer, 2);
-    composing_hangul = 0;
-  }
 
   temp = curwin->w_cursor.col;
   if (disabled_redraw) {

src/eval.c

@@ -10246,7 +10246,6 @@ static void f_has(typval_T *argvars, typval_T *rettv)
     "fork",
 #endif
     "gettext",
-    "hangul_input",
 #if defined(HAVE_ICONV_H) && defined(USE_ICONV)
     "iconv",
 #endif

src/globals.h

@@ -672,11 +672,6 @@ EXTERN int (*iconvctl)(iconv_t cd, int request, void *argument);
 EXTERN int* (*iconv_errno)(void);
 # endif
 
-
-
-EXTERN int composing_hangul INIT(= 0);
-EXTERN char_u composing_hangul_buffer[5];
-
 /*
  * "State" is the main state of Vim.
  * There are other variables that modify the state:

src/mbyte.c

@@ -3343,8 +3343,6 @@ char_u * mb_unescape(char_u **pp)
  */
 int mb_lefthalve(int row, int col)
 {
-  if (composing_hangul)
-    return TRUE;
   return (*mb_off2cells)(LineOffset[row] + col,
       LineOffset[row] + screen_Columns) > 1;
 }

src/version.c

@@ -94,7 +94,6 @@ static char *(features[]) =
   "+fork()",
 #endif
   "+gettext",
-  "+hangul_input",
 #if (defined(HAVE_ICONV_H) && defined(USE_ICONV)) || defined(DYNAMIC_ICONV)
 # ifdef DYNAMIC_ICONV
   "+iconv/dyn",