Cleanup 'ttym[ouse]', FEAT_MOUSE, mouse_(dec|gpm|etc.)

Because of 3baba1e7bc, it's dead code.

Helped-by: Justin M. Keyes <justinkz@gmail.com>

src/nvim/eval.c

@@ -9965,13 +9965,6 @@ static void f_has(typval_T *argvars, typval_T *rettv)
     "mksession",
     "modify_fname",
     "mouse",
-#if defined(UNIX)
-    "mouse_dec",
-    "mouse_netterm",
-    "mouse_sgr",
-    "mouse_urxvt",
-    "mouse_xterm",
-#endif
     "multi_byte",
     "multi_lang",
     "path_extra",

src/nvim/keymap.c

@@ -256,10 +256,6 @@ static struct key_name_entry {
   {'<',               (char_u *)"lt"},
 
   {K_MOUSE,           (char_u *)"Mouse"},
-  {K_NETTERM_MOUSE,   (char_u *)"NetMouse"},
-  {K_DEC_MOUSE,       (char_u *)"DecMouse"},
-  {K_URXVT_MOUSE,     (char_u *)"UrxvtMouse"},
-  {K_SGR_MOUSE,       (char_u *)"SgrMouse"},
   {K_LEFTMOUSE,       (char_u *)"LeftMouse"},
   {K_LEFTMOUSE_NM,    (char_u *)"LeftMouseNM"},
   {K_LEFTDRAG,        (char_u *)"LeftDrag"},

src/nvim/keymap.h

@@ -77,12 +77,6 @@
 #define KS_VER_SCROLLBAR        249
 #define KS_HOR_SCROLLBAR        248
 
-/*
- * These are used for DEC mouse
- */
-#define KS_NETTERM_MOUSE        247
-#define KS_DEC_MOUSE            246
-
 /*
  * Used for switching Select mode back on after a mapping or menu.
  */
@@ -103,12 +97,6 @@
 /* Used for menu in a tab pages line. */
 #define KS_TABMENU              239
 
-/* Used for the urxvt mouse. */
-#define KS_URXVT_MOUSE          238
-
-/* Used for the sgr mouse. */
-#define KS_SGR_MOUSE            237
-
 /*
  * Filler used after KS_SPECIAL and others
  */
@@ -407,11 +395,6 @@ enum key_extra {
 #define K_VER_SCROLLBAR TERMCAP2KEY(KS_VER_SCROLLBAR, KE_FILLER)
 #define K_HOR_SCROLLBAR   TERMCAP2KEY(KS_HOR_SCROLLBAR, KE_FILLER)
 
-#define K_NETTERM_MOUSE TERMCAP2KEY(KS_NETTERM_MOUSE, KE_FILLER)
-#define K_DEC_MOUSE     TERMCAP2KEY(KS_DEC_MOUSE, KE_FILLER)
-#define K_URXVT_MOUSE   TERMCAP2KEY(KS_URXVT_MOUSE, KE_FILLER)
-#define K_SGR_MOUSE     TERMCAP2KEY(KS_SGR_MOUSE, KE_FILLER)
-
 #define K_SELECT        TERMCAP2KEY(KS_SELECT, KE_FILLER)
 #define K_TEAROFF       TERMCAP2KEY(KS_TEAROFF, KE_FILLER)
 

src/nvim/option.c

@@ -1545,13 +1545,6 @@ static vimoption_T
   {"ttyfast",  "tf",  P_BOOL|P_NO_MKRC|P_VI_DEF,
    (char_u *)&p_force_on, PV_NONE,
    {(char_u *)TRUE, (char_u *)0L} SCRIPTID_INIT},
-  {"ttymouse",    "ttym", P_STRING|P_NODEFAULT|P_NO_MKRC|P_VI_DEF,
-#if defined(FEAT_MOUSE) && defined(UNIX)
-   (char_u *)&p_ttym, PV_NONE,
-#else
-   (char_u *)NULL, PV_NONE,
-#endif
-   {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
   {"undodir",     "udir", P_STRING|P_EXPAND|P_COMMA|P_NODUP|P_SECURE|P_VI_DEF,
    (char_u *)&p_udir, PV_NONE,
    {(char_u *)".", (char_u *)0L}
@@ -3245,9 +3238,6 @@ static void didset_options(void)
   (void)opt_strings_flags(p_fdo, p_fdo_values, &fdo_flags, TRUE);
   (void)opt_strings_flags(p_dy, p_dy_values, &dy_flags, TRUE);
   (void)opt_strings_flags(p_ve, p_ve_values, &ve_flags, TRUE);
-#if defined(FEAT_MOUSE) && defined(UNIX)
-  (void)opt_strings_flags(p_ttym, p_ttym_values, &ttym_flags, FALSE);
-#endif
   (void)spell_check_msm();
   (void)spell_check_sps();
   (void)compile_cap_prog(curwin->w_s);

src/nvim/option_defs.h

@@ -565,20 +565,6 @@ EXTERN char_u   *p_tsr;         /* 'thesaurus' */
 EXTERN int p_ttimeout;          /* 'ttimeout' */
 EXTERN long p_ttm;              /* 'ttimeoutlen' */
 EXTERN long p_ttyscroll;        /* 'ttyscroll' */
-#if defined(FEAT_MOUSE) && defined(UNIX)
-EXTERN char_u   *p_ttym;        /* 'ttymouse' */
-EXTERN unsigned ttym_flags;
-# ifdef IN_OPTION_C
-static char *(p_ttym_values[]) =
-{"xterm", "xterm2", "dec", "netterm", "urxvt", "sgr", NULL};
-# endif
-# define TTYM_XTERM             0x01
-# define TTYM_XTERM2            0x02
-# define TTYM_DEC               0x04
-# define TTYM_NETTERM           0x08
-# define TTYM_URXVT             0x20
-# define TTYM_SGR               0x40
-#endif
 EXTERN char_u   *p_udir;        /* 'undodir' */
 EXTERN long p_ul;               /* 'undolevels' */
 EXTERN long p_ur;               /* 'undoreload' */