selftests: remove obsolete gpio references from kselftest_deps.sh

GPIO Makefile has been greatly simplified so remove references to lines
which no longer exist.

Signed-off-by: Kent Gibson <[e-mail]>
Acked-by: Linus Walleij <[e-mail]>
Signed-off-by: Bartosz Golaszewski <[e-mail]>

tools/testing/selftests/kselftest_deps.sh

···
 		grep -v "VAR_LDLIBS" | awk -F: '{print $1}')
 
 # Level 3
-# gpio,  memfd and others use pkg-config to find mount and fuse libs
+# memfd and others use pkg-config to find mount and fuse libs
 # respectively and save it in VAR_LDLIBS. If pkg-config doesn't find
 # any, VAR_LDLIBS set to default.
 # Use the default value and filter out pkg-config for dependency check.
 # e.g:
-# gpio/Makefile
-#	VAR_LDLIBS := $(shell pkg-config --libs mount) 2>/dev/null)
 # memfd/Makefile
 #	VAR_LDLIBS := $(shell pkg-config fuse --libs 2>/dev/null)