Drop CrossCastAnd

It seems it's not needed since erasure already takes care of inserting
the necessary casts

Author: odersky

compiler/src/dotty/tools/dotc/Compiler.scala

@@ -76,8 +76,7 @@ class Compiler {
          new sjs.ExplicitJSClasses,  // Make all JS classes explicit (Scala.js only)
          new ExplicitOuter,          // Add accessors to outer classes from nested ones.
          new ExplicitSelf,           // Make references to non-trivial self types explicit as casts
-         new StringInterpolatorOpt,  // Optimizes raw and s string interpolators by rewriting them to string concatentations
-         new CrossCastAnd) ::        // Normalize selections involving intersection types.
+         new StringInterpolatorOpt) :: // Optimizes raw and s string interpolators by rewriting them to string concatentations
     List(new PruneErasedDefs,        // Drop erased definitions from scopes and simplify erased expressions
          new InlinePatterns,         // Remove placeholders of inlined patterns
          new VCInlineMethods,        // Inlines calls to value class methods