TOTP: Remove wolfssl submodule

.gitmodules

@@ -1,4 +0,0 @@
-[submodule "totp/lib/wolfssl"]
-	path = totp/lib/wolfssl
-	url = https://github.com/wolfSSL/wolfssl.git
-	branch = master

.utils/subdir-helper.sh

@@ -16,9 +16,7 @@ temp=$(echo ${repo%/} | rev | cut -d/ -f1,2 | rev | tr / -)-${branch}
 fetch=_fetch-${temp}
 split=_split-${temp}-$(echo ${subdir} | tr / -)
 git fetch --no-tags ${repo} ${branch}:${fetch}
-git submodule deinit --all -f
 git checkout ${fetch}
 git subtree split -P ${subdir} -b ${split}
 git checkout ${prev}
 git subtree ${action} -P ${path} ${split} -m "${action^} ${path} from ${repo}"
-git submodule update --init