Remove .gitmodules

Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 4fb26b5..0000000
--- a/.gitmodules
+++ /dev/null
@@ -1,3 +0,0 @@
-[submodule "framework"]
-	path = framework
-	url = https://github.com/Mbed-TLS/mbedtls-framework