Don't mention scala.Predef.Pair from the Tour

Duhemm · Duhemm · commit ecfb4457ad0c · 2018-10-31T08:30:29.000+01:00
`Pair` is deprecated since 2.11 and removed in 2.13.
diff --git a/_tour/implicit-conversions.md b/_tour/implicit-conversions.md
@@ -42,7 +42,7 @@ implicit def list2ordered[A](x: List[A])
   }
 ```
 
-The implicitly imported object `scala.Predef` declares several predefined types (e.g. `Pair`) and methods (e.g. `assert`) but also several implicit conversions.
+The implicitly imported object `scala.Predef` declares several aliases to frequently used types (e.g. `scala.collection.immutable.Map` is aliased to `Map`) and methods (e.g. `assert`) but also several implicit conversions.
 
 For example, when calling a Java method that expects a `java.lang.Integer`, you are free to pass it a `scala.Int` instead. That's because Predef includes the following implicit conversions:
 

Original file line number	Diff line number	Diff line change
`@@ -42,7 +42,7 @@ implicit def list2ordered[A](x: List[A])`
`42`	`42`	`}`
`43`	`43`	```
`44`	`44`
`45`		-The implicitly imported object `scala.Predef` declares several predefined types (e.g. `Pair`) and methods (e.g. `assert`) but also several implicit conversions.
	`45`	+The implicitly imported object `scala.Predef` declares several aliases to frequently used types (e.g. `scala.collection.immutable.Map` is aliased to `Map`) and methods (e.g. `assert`) but also several implicit conversions.
`46`	`46`
`47`	`47`	For example, when calling a Java method that expects a `java.lang.Integer`, you are free to pass it a `scala.Int` instead. That's because Predef includes the following implicit conversions:
`48`	`48`