pybricks.hubs: Hide NXT for now.

It isn't included in the beta yet, so it is confusing to show it in the docs already.

doc/common/conf.py

@@ -195,6 +195,7 @@ htmlhelp_basename = "Pybricksdoc"
 
 
 exclude_patterns = [
+    "hubs/nxtbrick.rst",
     "messaging.rst",
     "tools/datalog.rst",
     "*.rst.txt",

doc/main/hubs/index.rst

@@ -15,7 +15,6 @@
    primehub
    essentialhub
    ev3brick
-   nxtbrick
 
 .. pybricks-classlink:: MoveHub
 
@@ -58,9 +57,3 @@
 .. figure:: ../../main/cad/output/ev3device-ev3.png
     :width: 25%
     :target: ev3brick.html
-
-.. pybricks-classlink:: NXTBrick
-
-.. figure:: ../../main/cad/output/nxtdevice-nxt.png
-    :width: 25%
-    :target: nxtbrick.html