remove submodules in binder build

binder/postBuild

@@ -1,5 +1,20 @@
+#!/bin/sh
+
+cd xai_components
+core_dirs="xai_controlflow xai_events xai_template xai_utils"
+for dir in */ ; do
+    case " $core_dirs " in
+        *\ $dir*)
+            ;;
+        *)
+            rm -rf "$dir"
+            ;;
+    esac
+done
+cd ..
+
 python -m pip install -U pip
 pip install -e .
 jupyter labextension develop . --overwrite
 jupyter server extension enable xircuits
-xircuits list
+xircuits list