typeck: remove now-unnecessary parameter from diag

Removes `expected_pluralize` parameter from diagnostic struct which is
no longer necessary as the Fluent message can determine the correct
pluralization.

Signed-off-by: David Wood <david.wood@huawei.com>

Author: davidtwco

compiler/rustc_typeck/src/check/intrinsic.rs

@@ -7,7 +7,7 @@ use crate::errors::{
 };
 use crate::require_same_types;
 
-use rustc_errors::{pluralize, struct_span_err};
+use rustc_errors::struct_span_err;
 use rustc_hir as hir;
 use rustc_middle::traits::{ObligationCause, ObligationCauseCode};
 use rustc_middle::ty::subst::Subst;
@@ -43,7 +43,6 @@ fn equate_intrinsic_type<'tcx>(
                 span,
                 found,
                 expected,
-                expected_pluralize: pluralize!(expected),
                 descr,
             });
             false

compiler/rustc_typeck/src/errors.rs

@@ -30,7 +30,6 @@ pub struct WrongNumberOfGenericArgumentsToIntrinsic<'a> {
     pub span: Span,
     pub found: usize,
     pub expected: usize,
-    pub expected_pluralize: &'a str,
     pub descr: &'a str,
 }