Remove all references to JobActivity

The JobActivity event got replaced by callback functions provided to
jobstart() or termopen().

It got removed here:

6e7757ad51

runtime/doc/autocmd.txt

@@ -791,7 +791,7 @@ ShellCmdPost			After executing a shell command with |:!cmd|,
 				|:make| and |:grep|.  Can be used to check for
 				any changed files.
 				For non-blocking shell commands, see
-				|JobActivity|.
+				|job-control|.
 							*ShellFilterPost*
 ShellFilterPost			After executing a shell command with
 				":{range}!cmd", ":w !cmd" or ":r !cmd".

runtime/doc/eval.txt

@@ -4059,9 +4059,9 @@ jobstop({job})						{Nvim} *jobstop()*
 		Stop a job created with |jobstart()| by sending a `SIGTERM`
 		to the corresponding process. If the process doesn't exit
 		cleanly soon, a `SIGKILL` will be sent. When the job is
-		finally closed, a |JobActivity| event will trigger with
+		finally closed, the exit handler provided to |jobstart()| or
-		`v:job_data[0]` set to `exited`.  See |job-control| for more
+		|termopen()| will be run.
-		information.
+		See |job-control| for more information.
 
 jobwait({ids}[, {timeout}])				{Nvim} *jobwait()*
 		Wait for a set of jobs to finish. The {ids} argument is a list

runtime/syntax/vim.vim

@@ -62,7 +62,7 @@ syn keyword vimErrSetting contained	hardtabs ht w1200 w300 w9600
 
 " AutoCmd Events {{{2
 syn case ignore
-syn keyword vimAutoEvent contained	BufAdd BufCreate BufDelete BufEnter BufFilePost BufFilePre BufHidden BufLeave BufNew BufNewFile BufRead BufReadCmd BufReadPost BufReadPre BufUnload BufWinEnter BufWinLeave BufWipeout BufWrite BufWriteCmd BufWritePost BufWritePre Cmd-event CmdwinEnter CmdwinLeave ColorScheme CompleteDone CursorHold CursorHoldI CursorMoved CursorMovedI EncodingChanged FileAppendCmd FileAppendPost FileAppendPre FileChangedRO FileChangedShell FileChangedShellPost FileEncoding FileReadCmd FileReadPost FileReadPre FileType FileWriteCmd FileWritePost FileWritePre FilterReadPost FilterReadPre FilterWritePost FilterWritePre FocusGained FocusLost FuncUndefined GUIEnter GUIFailed InsertChange InsertCharPre InsertEnter InsertLeave JobActivity MenuPopup QuickFixCmdPost QuickFixCmdPre QuitPre RemoteReply SessionLoadPost ShellCmdPost ShellFilterPost SourceCmd SourcePre SpellFileMissing StdinReadPost StdinReadPre SwapExists Syntax TabEnter TabLeave TabNew TabNewEntered TabClosed TermChanged TermResponse TextChanged TextChangedI User UserGettingBored VimEnter VimLeave VimLeavePre VimResized WinEnter WinLeave 
+syn keyword vimAutoEvent contained	BufAdd BufCreate BufDelete BufEnter BufFilePost BufFilePre BufHidden BufLeave BufNew BufNewFile BufRead BufReadCmd BufReadPost BufReadPre BufUnload BufWinEnter BufWinLeave BufWipeout BufWrite BufWriteCmd BufWritePost BufWritePre Cmd-event CmdwinEnter CmdwinLeave ColorScheme CompleteDone CursorHold CursorHoldI CursorMoved CursorMovedI EncodingChanged FileAppendCmd FileAppendPost FileAppendPre FileChangedRO FileChangedShell FileChangedShellPost FileEncoding FileReadCmd FileReadPost FileReadPre FileType FileWriteCmd FileWritePost FileWritePre FilterReadPost FilterReadPre FilterWritePost FilterWritePre FocusGained FocusLost FuncUndefined GUIEnter GUIFailed InsertChange InsertCharPre InsertEnter InsertLeave MenuPopup QuickFixCmdPost QuickFixCmdPre QuitPre RemoteReply SessionLoadPost ShellCmdPost ShellFilterPost SourceCmd SourcePre SpellFileMissing StdinReadPost StdinReadPre SwapExists Syntax TabEnter TabLeave TabNew TabNewEntered TabClosed TermChanged TermResponse TextChanged TextChangedI User UserGettingBored VimEnter VimLeave VimLeavePre VimResized WinEnter WinLeave
 
 " Highlight commonly used Groupnames {{{2
 syn keyword vimGroup contained	Comment Constant String Character Number Boolean Float Identifier Function Statement Conditional Repeat Label Operator Keyword Exception PreProc Include Define Macro PreCondit Type StorageClass Structure Typedef Special SpecialChar Tag Delimiter SpecialComment Debug Underlined Ignore Error Todo 

src/nvim/fileio.c

@@ -6584,16 +6584,15 @@ apply_autocmds_group (
     fname = vim_strsave(fname);         /* make a copy, so we can change it */
   } else {
     sfname = vim_strsave(fname);
-    /* Don't try expanding FileType, Syntax, FuncUndefined, WindowID,
+    // don't try expanding the following events
-     * ColorScheme, QuickFixCmd or JobActivity */
+    if (event == EVENT_COLORSCHEME
-    if (event == EVENT_FILETYPE
+        || event == EVENT_FILETYPE
-        || event == EVENT_SYNTAX
         || event == EVENT_FUNCUNDEFINED
+        || event == EVENT_QUICKFIXCMDPOST
+        || event == EVENT_QUICKFIXCMDPRE
         || event == EVENT_REMOTEREPLY
         || event == EVENT_SPELLFILEMISSING
-        || event == EVENT_QUICKFIXCMDPRE
+        || event == EVENT_SYNTAX
-        || event == EVENT_COLORSCHEME
-        || event == EVENT_QUICKFIXCMDPOST
         || event == EVENT_TABCLOSED)
       fname = vim_strsave(fname);
     else

src/nvim/terminal.c

@@ -894,8 +894,7 @@ static void on_refresh(Event event)
   }
   Terminal *term;
   void *stub; (void)(stub);
-  // dont process autocommands while updating terminal buffers. JobActivity can
+  // don't process autocommands while updating terminal buffers
-  // be used act on terminal output.
   block_autocmds();
   map_foreach(invalidated_terminals, term, stub, {
     // TODO(SplinterOfChaos): Find the condition that makes term->buf invalid.

test/functional/job/job_spec.lua

@@ -61,7 +61,6 @@ describe('jobs', function()
     file:write("abc\0def\n")
     file:close()
 
-    -- v:job_data preserves NULs.
     nvim('command', "let j = jobstart(['cat', '"..filename.."'], g:job_opts)")
     eq({'notification', 'stdout', {0, {'abc\ndef', ''}}}, next_msg())
     eq({'notification', 'exit', {0, 0}}, next_msg())