syntax-check: remove README

This exception is no longer useful since README is just a symlink
to README.md, which is a subject to this check already.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

build-aux/syntax-check.mk

@@ -2100,7 +2100,7 @@ exclude_file_name_regexp--sc_prohibit_mixed_case_abbreviations = \
   ^src/(vbox/vbox_CAPI.*.h|esx/esx_vi.(c|h)|esx/esx_storage_backend_iscsi.c)$$
 
 exclude_file_name_regexp--sc_prohibit_empty_first_line = \
-  ^(README|src/esx/README|tests/(vmwarever|virhostcpu)data/.*)$$
+  ^(src/esx/README|tests/(vmwarever|virhostcpu)data/.*)$$
 
 exclude_file_name_regexp--sc_prohibit_useless_translation = \
   ^tests/virpolkittest.c