remove Makefile assignment of MAKE

For systems such as BSD that use gmake, do not set `MAKE=`.

2014/morgan/README.md

@@ -51,8 +51,7 @@ of rule targets).
 
 It should be able to build programs of previous years with the provided `Makefile`
 found in previous contest archives. Simply use this program instead of `make`.
-It will recursively use itself for sub-make (the `MAKE=` assignment inside
-`Makefile` will be ignored to continue using itself).
+It will recursively use itself for sub-make.
 
 
 ## Limitations / Known issues

2014/morgan/index.html

@@ -430,8 +430,7 @@ in Makefile, which will have precedence over environment variables.</li>
 </ul>
 <p>It should be able to build programs of previous years with the provided <code>Makefile</code>
 found in previous contest archives. Simply use this program instead of <code>make</code>.
-It will recursively use itself for sub-make (the <code>MAKE=</code> assignment inside
-<code>Makefile</code> will be ignored to continue using itself).</p>
+It will recursively use itself for sub-make.</p>
 <h2 id="limitations-known-issues">Limitations / Known issues</h2>
 <ul>
 <li>There are a lot of memory leaks (not a single free).</li>

var.mk

@@ -91,7 +91,6 @@ GENSTRINGS= genstrings
 GETOPT= getopt
 GETOPTS= getopts
 GINDENT= gindent
-GNUMAKE= gnumake
 GREP= grep
 GROFF= groff
 GROFFER= groffer
@@ -123,7 +122,6 @@ LINK= link
 LN= ln
 LS= ls
 M4= m4
-MAKE= make
 MAN= man
 MKDIR= mkdir
 MKFIFO= mkfifo