Eliminates intro

Which was probably OK for the book, but the reference to Perl is probably not needed. Since this intro is pretty much complete and adapted to the site, this closes #2145.

It might be interesting to add links to other parts of the documentation, but so far I think it's ready.

Author: JJ

doc/Language/101-basics.pod6

@@ -4,18 +4,13 @@
 
 =SUBTITLE A basic introductory example of a Perl 6 program
 
-Perl originated as a programming language intended to gather and summarize
-information from text files.  It's still strong in text processing, but Perl 5
-is also a powerful general-purpose programming language.  We think Perl 6 can
-be even better.
-
 Suppose that you host a table tennis tournament.  The referees tell you the
 results of each game in the format C<Player1 Player2 | 3:2>, which means
 that C<Player1> won against C<Player2> by 3 to 2 sets. You need a script that
 sums up how many matches and sets each player has won to determine the overall
 winner.
 
-The input data (stored in a file called "scores.txt") looks like this:
+The input data (stored in a file called C<scores.txt>) looks like this:
 
 =for code :lang<data>
     Beth Ana Charlie Dave