Revert "Update matrix delegation to point to new host"

This reverts commit 89e44684e0.
On second thought, this change was not needed for the migration.

static/.well-known/matrix/client

@@ -1,6 +1,6 @@
 {
 	"m.homeserver": {
-		"base_url": "https://newmatrix.jotoho.de:443"
+		"base_url": "https://matrix.jotoho.de:443"
 	},
 	"io.element.e2ee": {
 		"default": true,

static/.well-known/matrix/server

@@ -1,3 +1,3 @@
 {
-	"m.server": "newmatrix.jotoho.de:443"
+	"m.server": "matrix.jotoho.de:443"
 }