Revert back to upstream _filedir override avoidance

Redefining `_filedir` has its share of problems, it causes additional
hoops to jump through if people want to override it with theirs for some
reason.

Refs https://github.com/scop/bash-completion/pull/667

bash-completion-1.99-noblacklist.patch

@@ -1,12 +0,0 @@
-diff -up bash-completion-1.99/bash_completion~ bash-completion-1.99/bash_completion
---- bash-completion-1.99/bash_completion~	2012-01-08 01:03:46.000000000 +0200
-+++ bash-completion-1.99/bash_completion	2012-01-08 13:50:33.412012530 +0200
-@@ -45,7 +45,7 @@ readonly BASH_COMPLETION_COMPAT_DIR
- 
- # Blacklisted completions, causing problems with our code.
- #
--_blacklist_glob='@(acroread.sh)'
-+_blacklist_glob='@()' 
- 
- # Turn on extended globbing and programmable completion
- shopt -s extglob progcomp

bash-completion.spec

@@ -12,8 +12,6 @@ Summary:        Programmable completion for Bash
 License:        GPLv2+
 URL:            https://github.com/scop/bash-completion
 Source0:        https://github.com/scop/bash-completion/releases/download/%{version}/%{name}-%{version}.tar.xz
-# https://bugzilla.redhat.com/677446, see also redefine_filedir comments
-Patch0:         %{name}-1.99-noblacklist.patch
 
 BuildArch:      noarch
 %if %{with tests}
@@ -41,23 +39,8 @@ autoreconf -fi -v
 %configure
 %make_build
 
-cat <<EOF >redefine_filedir
-# This is a copy of the _filedir function in bash_completion, included
-# and (re)defined separately here because some versions of Adobe
-# Reader, if installed, are known to override this function with an
-# incompatible version, causing various problems.
-#
-# https://bugzilla.redhat.com/677446
-# http://forums.adobe.com/thread/745833
-
-EOF
-sed -ne '/^_filedir\s*(/,/^}/p' bash_completion >>redefine_filedir
-
-
 %install
 %make_install
-install -Dpm 644 redefine_filedir \
-    %{buildroot}%{_sysconfdir}/bash_completion.d/redefine_filedir
 
 # Updated completion shipped in cowsay package:
 rm %{buildroot}%{_datadir}/bash-completion/completions/{cowsay,cowthink}
@@ -93,6 +76,9 @@ make -C completions check
 
 
 %changelog
+* Tue Dec 21 2021 Ville Skyttä <ville.skytta@iki.fi>
+- Revert back to upstream _filedir override avoidance
+
 * Mon Nov 08 2021 Siteshwar Vashisht <svashisht@redhat.com> - 1:2.11-4
 - Avoid conflict with makepkg completions in pacman
   Resolves: #1819867