Remove tests involving the `Emoji_Test` property

`Emoji_Test` is not an official Unicode property of strings. Work on standardizing such a property (although likely under a different name) is happening: https://github.com/mathiasbynens/emoji-test-regex-pattern/issues/7

test/built-ins/RegExp/property-escapes/generated/strings/Emoji_Test-negative-CharacterClass.js

@@ -1,20 +0,0 @@
-// Copyright 2022 Mathias Bynens. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-author: Mathias Bynens
-description: >
-  Negating Unicode property escapes for `Emoji_Test` (property of strings) with `[^\p{…}]` throws an early error.
-info: |
-  Generated by https://github.com/mathiasbynens/unicode-property-escapes-tests
-  Unicode v15.0.0
-esid: sec-isvalidregularexpressionliteral
-features: [regexp-unicode-property-escapes, regexp-v-flag]
-negative:
-  phase: parse
-  type: SyntaxError
----*/
-
-$DONOTEVALUATE();
-
-/[^\p{Emoji_Test}]/v;

test/built-ins/RegExp/property-escapes/generated/strings/Emoji_Test-negative-P.js

@@ -1,20 +0,0 @@
-// Copyright 2022 Mathias Bynens. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-author: Mathias Bynens
-description: >
-  Negating Unicode property escapes for `Emoji_Test` (property of strings) with `\P{…}` throws an early error.
-info: |
-  Generated by https://github.com/mathiasbynens/unicode-property-escapes-tests
-  Unicode v15.0.0
-esid: sec-isvalidregularexpressionliteral
-features: [regexp-unicode-property-escapes, regexp-v-flag]
-negative:
-  phase: parse
-  type: SyntaxError
----*/
-
-$DONOTEVALUATE();
-
-/\P{Emoji_Test}/v;

test/built-ins/RegExp/property-escapes/generated/strings/Emoji_Test-negative-u.js

@@ -1,20 +0,0 @@
-// Copyright 2022 Mathias Bynens. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-author: Mathias Bynens
-description: >
-  Unicode property escapes for `Emoji_Test` (property of strings) with the `u` flag throws an early error. Properties of strings are only supported through the `v` flag.
-info: |
-  Generated by https://github.com/mathiasbynens/unicode-property-escapes-tests
-  Unicode v15.0.0
-esid: sec-patterns-static-semantics-early-errors
-features: [regexp-unicode-property-escapes, regexp-v-flag]
-negative:
-  phase: parse
-  type: SyntaxError
----*/
-
-$DONOTEVALUATE();
-
-/\p{Emoji_Test}/u;