remove damage debug options

Now that we use wlr_scene, wlroots handles these. If available use
the wlroots debug options instead.

include/sway/server.h

@@ -156,13 +156,6 @@ struct sway_debug {
 	bool noatomic;         // Ignore atomic layout updates
 	bool txn_timings;      // Log verbose messages about transactions
 	bool txn_wait;         // Always wait for the timeout before applying
-	bool noscanout;        // Disable direct scan-out
-
-	enum {
-		DAMAGE_DEFAULT,    // Default behaviour
-		DAMAGE_HIGHLIGHT,  // Highlight regions of the screen being damaged
-		DAMAGE_RERENDER,   // Render the full output when any damage occurs
-	} damage;
 };
 
 extern struct sway_debug debug;

sway/main.c

@@ -154,20 +154,14 @@ void restore_nofile_limit(void) {
 }
 
 void enable_debug_flag(const char *flag) {
-	if (strcmp(flag, "damage=highlight") == 0) {
-		debug.damage = DAMAGE_HIGHLIGHT;
-	} else if (strcmp(flag, "damage=rerender") == 0) {
-		debug.damage = DAMAGE_RERENDER;
-	} else if (strcmp(flag, "noatomic") == 0) {
+	if (strcmp(flag, "noatomic") == 0) {
 		debug.noatomic = true;
 	} else if (strcmp(flag, "txn-wait") == 0) {
 		debug.txn_wait = true;
 	} else if (strcmp(flag, "txn-timings") == 0) {
 		debug.txn_timings = true;
 	} else if (strncmp(flag, "txn-timeout=", 12) == 0) {
 		server.txn_timeout_ms = atoi(&flag[12]);
-	} else if (strcmp(flag, "noscanout") == 0) {
-		debug.noscanout = true;
 	} else {
 		sway_log(SWAY_ERROR, "Unknown debug flag: %s", flag);
 	}