Move the helpers into ide_db

crates/ide/src/inlay_hints.rs

@@ -1,7 +1,7 @@
 use either::Either;
 use hir::{known, Callable, HirDisplay, Semantics};
+use ide_db::helpers::FamousDefs;
 use ide_db::RootDatabase;
-use ide_helpers::FamousDefs;
 use stdx::to_lower_snake_case;
 use syntax::{
     ast::{self, ArgListOwner, AstNode, NameOwner},
@@ -428,7 +428,7 @@ fn get_callable(sema: &Semantics<RootDatabase>, expr: &ast::Expr) -> Option<hir:
 #[cfg(test)]
 mod tests {
     use expect_test::{expect, Expect};
-    use ide_helpers::FamousDefs;
+    use ide_db::helpers::FamousDefs;
     use test_utils::extract_annotations;
 
     use crate::{fixture, inlay_hints::InlayHintsConfig};