app_macro: Remove deprecated module.

For most modules that interacted with app_macro, this change is limited
to no longer looking for the current context from the macrocontext when
set.  Additionally, the following modules are impacted:

app_dial - no longer supports M^ connected/redirecting macro
app_minivm - samples written using macro will no longer work.
The sample needs a re-write

app_queue - can no longer a macro on the called party's channel.
Use gosub which is currently supported

ccss - no callback macro, gosub only

app_voicemail - no macro support

channel  - remove macrocontext and priority, no connected line or
redirection macro options
options - stdexten is deprecated to gosub as the default and only
pbx - removed macrolock
pbx_dundi - no longer look for macro

snmp - removed macro context, exten, and priority

ASTERISK-30304

Change-Id: I830daab293117179b8d61bd4df0d971a1b3d07f6

channels/chan_dahdi.c

@@ -1777,7 +1777,7 @@ static void my_handle_dtmf(void *pvt, struct ast_channel *ast, enum analog_sub a
 					ast_debug(1, "Disabling FAX tone detection on %s after tone received\n", ast_channel_name(ast));
 				}
 				if (strcmp(ast_channel_exten(ast), "fax")) {
-					const char *target_context = S_OR(ast_channel_macrocontext(ast), ast_channel_context(ast));
+					const char *target_context = ast_channel_context(ast);
 
 					/*
 					 * We need to unlock 'ast' here because ast_exists_extension has the
@@ -7433,7 +7433,7 @@ static void dahdi_handle_dtmf(struct ast_channel *ast, int idx, struct ast_frame
 					ast_debug(1, "Disabling FAX tone detection on %s after tone received\n", ast_channel_name(ast));
 				}
 				if (strcmp(ast_channel_exten(ast), "fax")) {
-					const char *target_context = S_OR(ast_channel_macrocontext(ast), ast_channel_context(ast));
+					const char *target_context = ast_channel_context(ast);
 
 					/*
 					 * We need to unlock 'ast' here because ast_exists_extension has the

channels/chan_pjsip.c

@@ -776,7 +776,7 @@ static struct ast_frame *chan_pjsip_cng_tone_detected(struct ast_channel *ast, s
 		return f;
 	}
 
-	target_context = S_OR(ast_channel_macrocontext(ast), ast_channel_context(ast));
+	target_context =  ast_channel_context(ast);
 
 	/*
 	 * We need to unlock the channel here because ast_exists_extension has the