SI-6441 removes Symbol.isOverride

`Symbol.isOverride` joins `Symbol.isLocal` in the unfortunate family
of methods for which we had to break source compatibility because of
their utter brokenness.

Apparently, `isOverride` only returns true for those symbols that have
the OVERRIDE flag set (i.e. the ones that are derived from source definitions
that have the `override` modifier specified next to them). Of course,
this is very confusing, and that’s exacerbated by the fact that we can’t
fix this behavior, because there’s `internal#Symbol.isOverride` that someone
might rely on.

Given that there’s perfectly working `Symbol.allOverriddenSymbols`,
this commit removes the `Symbol.isOverride` API altogether.

1 files changed, 0 insertions, 6 deletions

diff --git a/src/reflect/scala/reflect/api/Symbols.scala b/src/reflect/scala/reflect/api/Symbols.scala
index 852d49ee28..663eb97c58 100644
--- a/src/reflect/scala/reflect/api/Symbols.scala
+++ b/src/reflect/scala/reflect/api/Symbols.scala
@@ -491,12 +491,6 @@ trait Symbols { self: Universe =>
      */
     def isFinal: Boolean
 
-    /** Is this symbol overriding something?
-     *
-     *  @group Tests
-     */
-    def isOverride: Boolean
-
     /** Is this symbol abstract (i.e. an abstract class, an abstract method, value or type member)?
      *
      *  @group Tests