Revert "Add spellcheck prop"

This reverts commit 9ce1f9b042.

CHANGELOG.md

@@ -3,7 +3,6 @@
 ## Next
 
 - Added support for dropdowns and non-icon elements to `sl-input`
-- Added `spellcheck` prop to `sl-input`
 - Fixed a bug where `sl-progress-ring` rendered incorrectly when zoomed in Safari [#227](https://github.com/shoelace-style/shoelace/issues/227)
 - Fixed a bug where tabbing into slotted elements closes `sl-dropdown` when used in a shadow root [#223](https://github.com/shoelace-style/shoelace/issues/223)
 

src/components/input/input.tsx

@@ -100,9 +100,6 @@ export class Input {
   /** The input's autofocus attribute. */
   @Prop() autofocus: boolean;
 
-  /** Enables spell checking on the input. */
-  @Prop() spellcheck: boolean;
-
   /**
    * This will be true when the control is in an invalid state. Validity is determined by props such as `type`,
    * `required`, `minlength`, `maxlength`, and `pattern` using the browser's constraint validation API.
@@ -310,7 +307,6 @@ export class Input {
             autoComplete={this.autocomplete}
             autoCorrect={this.autocorrect}
             autoFocus={this.autofocus}
-            spellcheck={this.spellcheck}
             pattern={this.pattern}
             required={this.required}
             inputMode={this.inputmode}