Do not assert insertion result

We might have some duplicated name in some pattern and we should
therefore not assert the non duplication of identifiers.

gcc/rust/ChangeLog:

	* resolve/rust-late-name-resolver-2.0.cc (Late::visit): Remove
	assertion and explicitely tells why we ignore the insertion result.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

gcc/rust/resolve/rust-late-name-resolver-2.0.cc

@@ -151,10 +151,10 @@ Late::visit (AST::IdentifierPattern &identifier)
   // do we insert in labels or in values
   // but values does not allow shadowing... since functions cannot shadow
   // do we insert functions in labels as well?
-  auto ok
-    = ctx.values.insert (identifier.get_ident (), identifier.get_node_id ());
 
-  rust_assert (ok);
+  // We do want to ignore duplicated data because some situations rely on it.
+  std::ignore
+    = ctx.values.insert (identifier.get_ident (), identifier.get_node_id ());
 }
 
 void