Remove external/ms-tpm-20-ref/.gitmodules and submodule directories am: 5d68d01a1a am: fac045177b am: ef87020c15

Original change: https://android-review.googlesource.com/c/platform/external/ms-tpm-20-ref/+/1830606

Change-Id: If48fad75eb49e986d837025a8624467c3894efde
diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index d1f75cd..0000000
--- a/.gitmodules
+++ /dev/null
@@ -1,3 +0,0 @@
-[submodule "external/wolfssl"]
-	path = external/wolfssl
-	url = https://github.com/wolfSSL/wolfssl.git
diff --git a/external/wolfssl b/external/wolfssl
deleted file mode 160000
index 74ebf51..0000000
--- a/external/wolfssl
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 74ebf510a3d73e98767eac26082eabdc84e19d31