removed some cached works-tmp submodules

diff --git a/works-tmp/roman-numeral-converter b/works-tmp/roman-numeral-converter
deleted file mode 160000 (submodule)
index 2457a3a..0000000
--- a/works-tmp/roman-numeral-converter
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 2457a3a1e4c7530c00890d2d2ab727538e6a06e4

diff --git a/works-tmp/temperature-converter b/works-tmp/temperature-converter
deleted file mode 160000 (submodule)
index 374b61a..0000000
--- a/works-tmp/temperature-converter
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 374b61a8f7fc19c1503c985f806980b8fd44ca8c