Remove incorrect reference to "Java parameter name length"

There is no practice in the Java community or "ecosystem" that would discourage short parameter names. On the contrary even the Java standard libraries often use single letter variable names when the purpose of the parameter is evident from the context.

So I have removed the statement as it is simply incorrect.

Author: anttibraxbackup

_style/naming-conventions.md

@@ -356,8 +356,7 @@ for local names to be very short:
 
     def add(a: Int, b: Int) = a + b
 
-This would be bad practice in languages like Java, but it is *good*
-practice in Scala. This convention works because properly-written Scala
+This convention works because properly-written Scala
 methods are quite short, only spanning a single expression and rarely
 going beyond a few lines. Few local names are used (including
 parameters), and so there is no need to contrive long, descriptive