Fix some TODOs (#1567)

Author: fisker

test/no-static-only-class.mjs

@@ -21,9 +21,8 @@ test.snapshot({
 		'class A3 { static #a = 1; }',
 		'const A3 = class { static #a() {}; }',
 		'const A3 = class { static #a = 1; }',
-		// TODO: enable this test when ESLint support `StaticBlock`
 		// Static block
-		// 'class A2 { static {}; }',
+		'class A2 { static {}; }',
 	],
 	invalid: [
 		'class A { static a() {}; }',

test/prefer-number-properties.mjs

@@ -169,9 +169,6 @@ const errorNaN = [
 	},
 ];
 
-// TODO: Add following tests whenESLint support `proposal-class-fields`
-// 'class Foo {NaN = 1}',
-// 'class Foo {[NaN] = 1}',
 test({
 	valid: [
 		'const foo = Number.NaN;',
@@ -202,6 +199,9 @@ test({
 		'class NaN {}',
 		'const Foo = class NaN {}',
 		'class Foo {NaN(){}}',
+		'class Foo {#NaN(){}}',
+		'class Foo3 {NaN = 1}',
+		'class Foo {#NaN = 1}',
 		outdent`
 			NaN: for (const foo of bar) {
 				if (a) {
@@ -289,6 +289,11 @@ test({
 			output: 'const foo = Number.NaN.toString();',
 			errors: errorNaN,
 		},
+		{
+			code: 'class Foo3 {[NaN] = 1}',
+			output: 'class Foo3 {[Number.NaN] = 1}',
+			errors: errorNaN,
+		},
 	],
 });