fix bugs in inline/force_inline and diagnostics of all attr parsers

compiler/rustc_attr_data_structures/src/attributes.rs

@@ -235,8 +235,6 @@ pub enum AttributeKind {
 
     /// Represents [`#[repr]`](https://doc.rust-lang.org/stable/reference/type-layout.html#representations).
     Repr(ThinVec<(ReprAttr, Span)>),
-    /// Represents `#[rustc_force_inline]`
-    RustcForceInline(Span, Option<Symbol>),
     /// Represents `#[stable]`, `#[unstable]` and `#[rustc_allowed_through_unstable_modules]`.
     Stability {
         stability: Stability,

compiler/rustc_attr_data_structures/src/lints.rs

@@ -11,4 +11,5 @@ pub struct AttributeLint<Id> {
 #[derive(Clone, Debug, HashStable_Generic)]
 pub enum AttributeLintKind {
     UnusedDuplicate { this: Span, other: Span, warning: bool },
+    IllFormedAttributeInput { suggestions: Vec<String> },
 }