Remove unused error codes from error_codes.rs and from EXEMPTED_FROM_TEST constant

Author: GuillaumeGomez

compiler/rustc_error_codes/src/error_codes.rs

@@ -609,7 +609,7 @@ E0783: include_str!("./error_codes/E0783.md"),
 //  E0540, // multiple rustc_deprecated attributes
     E0544, // multiple stability levels
 //  E0548, // replaced with a generic attribute input check
-    E0553, // multiple rustc_const_unstable attributes
+//  E0553, // multiple rustc_const_unstable attributes
 //  E0555, // replaced with a generic attribute input check
 //  E0558, // replaced with a generic attribute input check
 //  E0563, // cannot determine a type for this `impl Trait` removed in 6383de15
@@ -620,10 +620,9 @@ E0783: include_str!("./error_codes/E0783.md"),
 //  E0612, // merged into E0609
 //  E0613, // Removed (merged with E0609)
     E0625, // thread-local statics cannot be accessed at compile-time
-    E0629, // missing 'feature' (rustc_const_unstable)
-    // rustc_const_unstable attribute must be paired with stable/unstable
-    // attribute
-    E0630,
+//  E0629, // missing 'feature' (rustc_const_unstable)
+//  E0630, // rustc_const_unstable attribute must be paired with stable/unstable
+           // attribute
     E0632, // cannot provide explicit generic arguments when `impl Trait` is
            // used in argument position
     E0640, // infer outlives requirements

src/tools/tidy/src/error_codes_check.rs

@@ -11,10 +11,8 @@ use regex::Regex;
 
 // A few of those error codes can't be tested but all the others can and *should* be tested!
 const EXEMPTED_FROM_TEST: &[&str] = &[
-    "E0227", "E0279", "E0280", "E0313", "E0315", "E0377", "E0461", "E0462", "E0464", "E0465",
-    "E0473", "E0474", "E0475", "E0476", "E0479", "E0480", "E0481", "E0482", "E0483", "E0484",
-    "E0485", "E0486", "E0487", "E0488", "E0489", "E0514", "E0519", "E0523", "E0554", "E0570",
-    "E0640", "E0717", "E0729",
+    "E0227", "E0279", "E0280", "E0313", "E0377", "E0461", "E0462", "E0464", "E0465", "E0476",
+    "E0482", "E0514", "E0519", "E0523", "E0554", "E0570", "E0640", "E0717", "E0729",
 ];
 
 // Some error codes don't have any tests apparently...