doxygen: delete wrong commited file

diff --git a/view/theme/boheme b/view/theme/boheme
deleted file mode 160000 (submodule)
index 3009bdd..0000000
--- a/view/theme/boheme
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 3009bdd2c2720d481028cb03671a5987160b8279