build: Remove in-tree config files from gitignore

meson doesn't do any in tree builds. Remove the old Makefile generated
config files from gitignore.

Signed-off-by: Daniel Wagner <[email protected]>

Author: dwsuse

.gitignore

@@ -19,11 +19,6 @@ examples/display-columnar
 examples/telemetry-listen
 examples/discover-loop
 
-config.h
-ccan/config.h
-ccan/ccan-config.h
-ccan/tools/configurator/configurator
-
 doc/_build
 
 config-host.h