5 files changed, 0 insertions, 44 deletions
diff --git a/src/nvim/cmdexpand.c b/src/nvim/cmdexpand.c
index 774e16f73d..f2776191b7 100644
--- a/src/nvim/cmdexpand.c
+++ b/src/nvim/cmdexpand.c
@@ -2104,10 +2104,6 @@ static const char *set_context_by_cmdname(const char *cmd, cmdidx_T cmdidx, expa
     xp->xp_context = EXPAND_CHECKHEALTH;
     xp->xp_pattern = (char *)arg;
     break;
-  case CMD_behave:
-    xp->xp_context = EXPAND_BEHAVE;
-    xp->xp_pattern = (char *)arg;
-    break;
 
   case CMD_messages:
     xp->xp_context = EXPAND_MESSAGES;
@@ -2479,19 +2475,6 @@ static int expand_files_and_dirs(expand_T *xp, char *pat, char ***matches, int *
 }
 
 /// Function given to ExpandGeneric() to obtain the possible arguments of the
-/// ":behave {mswin,xterm}" command.
-static char *get_behave_arg(expand_T *xp FUNC_ATTR_UNUSED, int idx)
-{
-  if (idx == 0) {
-    return "mswin";
-  }
-  if (idx == 1) {
-    return "xterm";
-  }
-  return NULL;
-}
-
-/// Function given to ExpandGeneric() to obtain the possible arguments of the
 /// ":breakadd {expr, file, func, here}" command.
 /// ":breakdel {func, file, here}" command.
 static char *get_breakadd_arg(expand_T *xp FUNC_ATTR_UNUSED, int idx)
@@ -2585,7 +2568,6 @@ static int ExpandOther(char *pat, expand_T *xp, regmatch_T *rmp, char ***matches
     int escaped;
   } tab[] = {
     { EXPAND_COMMANDS, get_command_name, false, true },
-    { EXPAND_BEHAVE, get_behave_arg, true, true },
     { EXPAND_MAPCLEAR, get_mapclear_arg, true, true },
     { EXPAND_MESSAGES, get_messages_arg, true, true },
     { EXPAND_HISTORY, get_history_arg, true, true },
diff --git a/src/nvim/ex_cmds.lua b/src/nvim/ex_cmds.lua
index 2fd50a18d3..bdc1174de3 100644
--- a/src/nvim/ex_cmds.lua
+++ b/src/nvim/ex_cmds.lua
@@ -197,12 +197,6 @@ module.cmds = {
     func='ex_bunload',
   },
   {
-    command='behave',
-    flags=bit.bor(BANG, NEEDARG, WORD1, TRLBAR, CMDWIN, LOCK_OK),
-    addr_type='ADDR_NONE',
-    func='ex_behave',
-  },
-  {
     command='belowright',
     flags=bit.bor(NEEDARG, EXTRA, NOTRLCOM),
     addr_type='ADDR_NONE',
diff --git a/src/nvim/ex_docmd.c b/src/nvim/ex_docmd.c
index 699c1da3a7..fbdb1bc2d7 100644
--- a/src/nvim/ex_docmd.c
+++ b/src/nvim/ex_docmd.c
@@ -7058,24 +7058,6 @@ void dialog_msg(char *buff, char *format, char *fname)
   vim_snprintf(buff, DIALOG_MSG_SIZE, format, fname);
 }
 
-/// ":behave {mswin,xterm}"
-static void ex_behave(exarg_T *eap)
-{
-  if (strcmp(eap->arg, "mswin") == 0) {
-    set_option_value_give_err("selection", 0L, "exclusive", 0);
-    set_option_value_give_err("selectmode", 0L, "mouse,key", 0);
-    set_option_value_give_err("mousemodel", 0L, "popup", 0);
-    set_option_value_give_err("keymodel", 0L, "startsel,stopsel", 0);
-  } else if (strcmp(eap->arg, "xterm") == 0) {
-    set_option_value_give_err("selection", 0L, "inclusive", 0);
-    set_option_value_give_err("selectmode", 0L, "", 0);
-    set_option_value_give_err("mousemodel", 0L, "extend", 0);
-    set_option_value_give_err("keymodel", 0L, "", 0);
-  } else {
-    semsg(_(e_invarg2), eap->arg);
-  }
-}
-
 static TriState filetype_detect = kNone;
 static TriState filetype_plugin = kNone;
 static TriState filetype_indent = kNone;
diff --git a/src/nvim/usercmd.c b/src/nvim/usercmd.c
index 4cd58bb91b..e859a96552 100644
--- a/src/nvim/usercmd.c
+++ b/src/nvim/usercmd.c
@@ -56,7 +56,6 @@ static const char e_no_such_user_defined_command_in_current_buffer_str[]
 static const char *command_complete[] = {
   [EXPAND_ARGLIST] = "arglist",
   [EXPAND_AUGROUP] = "augroup",
-  [EXPAND_BEHAVE] = "behave",
   [EXPAND_BUFFERS] = "buffer",
   [EXPAND_CHECKHEALTH] = "checkhealth",
   [EXPAND_COLORS] = "color",
diff --git a/src/nvim/vim.h b/src/nvim/vim.h
index 00e28e3e68..44e3e9d86a 100644
--- a/src/nvim/vim.h
+++ b/src/nvim/vim.h
@@ -140,7 +140,6 @@ enum {
   EXPAND_SHELLCMD,
   EXPAND_SIGN,
   EXPAND_PROFILE,
-  EXPAND_BEHAVE,
   EXPAND_FILETYPE,
   EXPAND_FILES_IN_PATH,
   EXPAND_OWNSYNTAX,