remove submodules

[matrix_esp_thesis] / ext / mjson

diff --git a/ext/mjson b/ext/mjson
deleted file mode 160000 (submodule)
index b766f34..0000000
--- a/ext/mjson
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit b766f343bf68b8ea89889055acbf8aef820e2b71