Don't install outdated xtapemon

Makefile

@@ -1,4 +1,4 @@
-all: xgterm ximtool xtapemon
+all: xgterm ximtool
 
 PREFIX = /usr/local
 
@@ -35,5 +35,3 @@ install: xgterm ximtool xtapemon
 	if [ -x ximtool/clients/ism_wcspix.e ] ; then \
 	    install -m755 ximtool/clients/ism_wcspix.e ${PREFIX}/bin ; \
 	fi
-	install -m755 xtapemon/xtapemon ${PREFIX}/bin
-	install -m755 xtapemon/xtapemon.man ${PREFIX}/man/man1/xtapemon.1

README.md

@@ -22,10 +22,6 @@ provides the following programs:
    about either axis, frame blink, windowing of the display, and colortable
    enhancement.
 
- * **XTapemon** is a conventional Xt/Athena application which allows the
-   status of an IRAF tape job to be monitored continuously while the tape is
-   being accessed.
-
 Manual pages are included for all the above utilities.
 
 
@@ -64,7 +60,7 @@ The source distribution file is built as a tarball with the package
 name and version as base directory. Thus, distribution files can be
 unpacked with the command
 
-    $ tar zxf /<path>/x11iraf-2.0-2020.06.15.tar.gz
+    $ tar xzf /<path>/x11iraf-2.0-2020.06.15.tar.gz
     $ cd x11iraf-2.0-2020.06.15/
 
 
@@ -87,3 +83,7 @@ root
 Both XGterm and XImtool rely upon the IRAF Object Manager for the GUI.  The
 **guidemo** package illustrates how to use GUIs in IRAF applications. The
 **obmsh** package provides a simple shell for the object manager.
+
+**XTapemon** is a conventional Xt/Athena application which allows the status
+of an IRAF tape job to be monitored continuously while the tape is being
+accessed.