Remove rustc_session::config::Config

The wrapper type led to tons of target.target
across the compiler. Its ptr_width field isn't
required any more, as target_pointer_width
is already present in parsed form.

clippy_lints/src/trivially_copy_pass_by_ref.rs

@@ -9,10 +9,10 @@ use rustc_hir::intravisit::FnKind;
 use rustc_hir::{Body, FnDecl, HirId, ItemKind, MutTy, Mutability, Node};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty;
-use rustc_session::config::Config as SessionConfig;
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 use rustc_span::Span;
 use rustc_target::abi::LayoutOf;
+use rustc_target::spec::Target;
 use rustc_target::spec::abi::Abi;
 
 declare_clippy_lint! {
@@ -60,9 +60,9 @@ pub struct TriviallyCopyPassByRef {
 }
 
 impl<'tcx> TriviallyCopyPassByRef {
-    pub fn new(limit: Option<u64>, target: &SessionConfig) -> Self {
+    pub fn new(limit: Option<u64>, target: &Target) -> Self {
         let limit = limit.unwrap_or_else(|| {
-            let bit_width = u64::from(target.ptr_width);
+            let bit_width = u64::from(target.pointer_width);
             // Cap the calculated bit width at 32-bits to reduce
             // portability problems between 32 and 64-bit targets
             let bit_width = cmp::min(bit_width, 32);