drop obsolete downstream-only extension of date(1) man page

This was addressed by the following upstream patch long time ago:
https://git.savannah.gnu.org/gitweb/?p=coreutils.git;a=commitdiff;h=COREUTILS-5_2_1-1561-gdf8ea7a4e89

coreutils.spec

@@ -27,7 +27,7 @@ Patch2: coreutils-nfsv4-acls.patch
 Patch100: coreutils-8.26-test-lock.patch
 
 # require_selinux_(): use selinuxenabled(8) if available
-Patch105: coreutils-8.26-selinuxenable.patch
+Patch101: coreutils-8.26-selinuxenable.patch
 
 # downstream changes to default DIR_COLORS
 Patch102: coreutils-8.32-DIR_COLORS.patch
@@ -35,9 +35,6 @@ Patch102: coreutils-8.32-DIR_COLORS.patch
 # df --direct
 Patch104: coreutils-df-direct.patch
 
-# add info about TZ envvar to date manpage
-Patch703: sh-utils-2.0.11-dateman.patch
-
 # (sb) lin18nux/lsb compliance - multibyte functionality patch
 Patch800: coreutils-i18n.patch
 
@@ -265,6 +262,7 @@ rm -f $RPM_BUILD_ROOT%{_infodir}/dir
 
 %changelog
 * Mon Jan 02 2023 Kamil Dudka <kdudka@redhat.com> - 9.1-10
+- drop obsolete downstream-only extension of date(1) man page
 - undocument downstream SELinux options deprecated since 2009
 
 * Mon Jan 02 2023 Kamil Dudka <kdudka@redhat.com> - 9.1-9

sh-utils-2.0.11-dateman.patch

@@ -1,12 +0,0 @@
-diff -urNp coreutils-5.97-orig/man/date.x coreutils-5.97/man/date.x
---- coreutils-5.97-orig/man/date.x	1999-11-02 15:07:36.000000000 +0100
-+++ coreutils-5.97/man/date.x	2008-10-15 10:13:31.000000000 +0200
-@@ -11,3 +11,8 @@ calendar date, time of day, time zone, day of week, relative time,
- relative date, and numbers.  An empty string indicates the beginning
- of the day.  The date string format is more complex than is easily
- documented here but is fully described in the info documentation.
-+[ENVIRONMENT]
-+.TP
-+TZ
-+Specifies the timezone, unless overridden by command line parameters.
-+If neither is specified, the setting from /etc/localtime is used.