remove unused module

.gitmodules

@@ -1,15 +1,3 @@
 [submodule "lib/lsp-utils/specification/language-server-protocol"]
 	path = language-server-protocol
 	url = https://github.com/microsoft/language-server-protocol.git
-[submodule "submodules/lem-base16-themes"]
-	path = submodules/lem-base16-themes
-	url = https://github.com/lem-project/lem-base16-themes.git
-[submodule "submodules/micros"]
-	path = submodules/micros
-	url = https://github.com/lem-project/micros
-[submodule "submodules/mailbox"]
-	path = submodules/mailbox
-	url = https://github.com/lem-project/lem-mailbox.git
-[submodule "submodules/quick-patch"]
-	path = submodules/quick-patch
-	url = https://github.com/Sasanidas/quick-patch.git