Revert "[man pages]: Define page-local `MR` fallback."

This reverts commit 18d708e489758636ff9e168eee2592591755eb61.

Unfortunately my clever hack [sic] does not work with mandoc 1.14.5,
causing that tool to truncate the entire text of the man page after the
summary description.

The good news is that there is a simpler replacement that works better,
forthcoming.

7 files changed, 0 insertions, 91 deletions

diff --git a/man/groff.7.man b/man/groff.7.man
index 31c7d1f39..0391e5b8a 100644
--- a/man/groff.7.man
+++ b/man/groff.7.man
@@ -28,19 +28,6 @@ language reference
 .do nr *groff_groff_7_man_C \n[.cp]
 .cp 0
 .
-.\" Define fallback for groff 1.23's MR macro if the system lacks it.
-.de @@
-.  de MR
-.    ie \n(.$=1 \
-.      I %\$1
-.    el \
-.      IR %\$1 (\$2)\$3
-.  \\.
-..
-.if  \n(.g .if !d MR .@@
-.if !\n(.g .@@
-.rm @@
-.
 .
 .\" ====================================================================
 .\" Setup
diff --git a/man/groff_char.7.man b/man/groff_char.7.man
index a004b8488..188fb80d3 100644
--- a/man/groff_char.7.man
+++ b/man/groff_char.7.man
@@ -30,19 +30,6 @@ special character and glyph repertoire
 .do nr *groff_groff_char_7_man_C \n[.cp]
 .cp 0
 .
-.\" Define fallback for groff 1.23's MR macro if the system lacks it.
-.de @@
-.  de MR
-.    ie \n(.$=1 \
-.      I %\$1
-.    el \
-.      IR %\$1 (\$2)\$3
-.  \\.
-..
-.if  \n(.g .if !d MR .@@
-.if !\n(.g .@@
-.rm @@
-.
 .
 .\" ====================================================================
 .SH Description
diff --git a/man/groff_diff.7.man b/man/groff_diff.7.man
index 6f81cd9fe..f27dcc281 100644
--- a/man/groff_diff.7.man
+++ b/man/groff_diff.7.man
@@ -29,19 +29,6 @@ and AT&T
 .do nr *groff_groff_diff_7_man_C \n[.cp]
 .cp 0
 .
-.\" Define fallback for groff 1.23's MR macro if the system lacks it.
-.de @@
-.  de MR
-.    ie \n(.$=1 \
-.      I %\$1
-.    el \
-.      IR %\$1 (\$2)\$3
-.  \\.
-..
-.if  \n(.g .if !d MR .@@
-.if !\n(.g .@@
-.rm @@
-.
 .
 .\" ====================================================================
 .\" Local definitions
diff --git a/man/groff_font.5.man b/man/groff_font.5.man
index cace1aa32..a26003ed9 100644
--- a/man/groff_font.5.man
+++ b/man/groff_font.5.man
@@ -28,19 +28,6 @@ device and font description files
 .do nr *groff_groff_font_5_man_C \n[.cp]
 .cp 0
 .
-.\" Define fallback for groff 1.23's MR macro if the system lacks it.
-.de @@
-.  de MR
-.    ie \n(.$=1 \
-.      I %\$1
-.    el \
-.      IR %\$1 (\$2)\$3
-.  \\.
-..
-.if  \n(.g .if !d MR .@@
-.if !\n(.g .@@
-.rm @@
-.
 .
 .\" ====================================================================
 .SH Description
diff --git a/man/groff_out.5.man b/man/groff_out.5.man
index f31fd3212..65386de45 100644
--- a/man/groff_out.5.man
+++ b/man/groff_out.5.man
@@ -28,19 +28,6 @@ intermediate output format
 .do nr *groff_groff_out_5_man_C \n[.cp]
 .cp 0
 .
-.\" Define fallback for groff 1.23's MR macro if the system lacks it.
-.de @@
-.  de MR
-.    ie \n(.$=1 \
-.      I %\$1
-.    el \
-.      IR %\$1 (\$2)\$3
-.  \\.
-..
-.if  \n(.g .if !d MR .@@
-.if !\n(.g .@@
-.rm @@
-.
 .
 .\" ====================================================================
 .\" Setup
diff --git a/man/groff_tmac.5.man b/man/groff_tmac.5.man
index 02dda7888..20d1953d0 100644
--- a/man/groff_tmac.5.man
+++ b/man/groff_tmac.5.man
@@ -27,19 +27,6 @@ typesetting system
 .do nr *groff_groff_tmac_5_man_C \n[.cp]
 .cp 0
 .
-.\" Define fallback for groff 1.23's MR macro if the system lacks it.
-.de @@
-.  de MR
-.    ie \n(.$=1 \
-.      I %\$1
-.    el \
-.      IR %\$1 (\$2)\$3
-.  \\.
-..
-.if  \n(.g .if !d MR .@@
-.if !\n(.g .@@
-.rm @@
-.
 .
 .\" TODO: Consider parallelizing with our Texinfo node "Macro Packages".
 .\" ====================================================================
diff --git a/man/roff.7.man b/man/roff.7.man
index 80831970b..153d2d336 100644
--- a/man/roff.7.man
+++ b/man/roff.7.man
@@ -31,19 +31,6 @@ typesetting
 .do nr *groff_roff_7_man_C \n[.cp]
 .cp 0
 .
-.\" Define fallback for groff 1.23's MR macro if the system lacks it.
-.de @@
-.  de MR
-.    ie \n(.$=1 \
-.      I %\$1
-.    el \
-.      IR %\$1 (\$2)\$3
-.  \\.
-..
-.if  \n(.g .if !d MR .@@
-.if !\n(.g .@@
-.rm @@
-.
 .
 .\" ====================================================================
 .SH Description