depends: Drop redundant check for downloaded file

The `fetch_file` commands are invoked for the `$($(package)_fetched)`
target, so the existence of the download stamp has already been tested.

Author: hebasto

depends/funcs.mk

@@ -36,9 +36,8 @@ define fetch_file_inner
 endef
 
 define fetch_file
-    ( test -f $$($(1)_source_dir)/$(4) || \
     ( $(call fetch_file_inner,$(1),$(2),$(3),$(4),$(5)) || \
-      $(call fetch_file_inner,$(1),$(FALLBACK_DOWNLOAD_PATH),$(3),$(4),$(5))))
+      $(call fetch_file_inner,$(1),$(FALLBACK_DOWNLOAD_PATH),$(3),$(4),$(5)))
 endef
 
 # Shell script to create a source tarball in $(1)_source from local directory