Revert "Make sure README.md mentions that make can build in parallel."

This reverts commit 0b72347d.

README.md

@@ -62,14 +62,9 @@ dblatex.
 
     $ perl boot
     $ ./configure
-    $ make         # can also say 'make -jX' for X number of jobs
+    $ make
     $ make install
 
-(NB: **Do you have multiple cores? Be sure to tell that to `make`!** This can
-save you hours of build time depending on your system configuration, and is
-almost always a win regardless of how many cores you have. As a simple rule,
-you should have about `N`+1 jobs, where `N` is the amount of cores you have.)
-
 The `perl boot` step is only necessary if this is a tree checked out
 from git.  For source distributions downloaded from [GHC's web site] [1],
 this step has already been performed.

Cabal @ 14c5a3f7

-Subproject commit 09289c0e1f3eb667aa30f6d4189e19186f433119
+Subproject commit 14c5a3f78c00772cf54c2fd5c920a64d53e6f594