chore: remove unused chat files (#36861)

## Description
I forgot to delete it in the previous issue. 

## Automation

/ok-to-test tags="@tag.Sanity"

### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results  -->
> [!TIP]
> 🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/11325795465>
> Commit: 6ec1c0f877a1af03bdfc97059e598c6b4218f64b
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=11325795465&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Sanity`
> Spec:
> <hr>Mon, 14 Oct 2024 11:06:16 UTC
<!-- end of auto-generated comment: Cypress test results  -->


## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Bug Fixes**
- Removed the `ChatInput` component, which previously provided a
customizable text input area with features for error handling and
dynamic resizing.

- **Chores**
- Deleted the associated TypeScript type definitions for
`ChatInputProps`, simplifying the component structure.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

app/client/packages/design-system/widgets/src/components/ChatInput/src/ChatInput.tsx

@@ -1,171 +0,0 @@
-import clsx from "clsx";
-import {
-  FieldError,
-  FieldLabel,
-  inputFieldStyles,
-  IconButton,
-  TextAreaInput,
-} from "@appsmith/wds";
-import { useControlledState } from "@react-stately/utils";
-import { chain, useLayoutEffect } from "@react-aria/utils";
-import { TextField as HeadlessTextField } from "react-aria-components";
-import React, { useCallback, useRef, useEffect, useState } from "react";
-
-import type { ChatInputProps } from "./types";
-
-export function ChatInput(props: ChatInputProps) {
-  const {
-    contextualHelp,
-    errorMessage,
-    isDisabled,
-    isInvalid,
-    isLoading,
-    isReadOnly,
-    isRequired,
-    isSubmitDisabled,
-    label,
-    onChange,
-    onSubmit,
-    prefix,
-    suffix: suffixProp,
-    value,
-    ...rest
-  } = props;
-
-  const inputRef = useRef<HTMLTextAreaElement>(null);
-  const [initialHeight, setInitialHeight] = useState<number | null>(null);
-  const [inputValue, setInputValue] = useControlledState(
-    props.value,
-    props.defaultValue ?? "",
-    () => {
-      //
-    },
-  );
-
-  useEffect(() => {
-    if (inputRef.current && initialHeight === null) {
-      const input = inputRef.current;
-      const computedStyle = window.getComputedStyle(input);
-      const height = parseFloat(computedStyle.height) || 0;
-      const paddingTop = parseFloat(computedStyle.paddingTop) || 0;
-      const paddingBottom = parseFloat(computedStyle.paddingBottom) || 0;
-
-      setInitialHeight(height + paddingTop + paddingBottom);
-    }
-  }, [initialHeight]);
-
-  const onHeightChange = useCallback(() => {
-    // Quiet textareas always grow based on their text content.
-    // Standard textareas also grow by default, unless an explicit height is set.
-    if (props.height == null && inputRef.current) {
-      const input = inputRef.current;
-      const prevAlignment = input.style.alignSelf;
-      const prevOverflow = input.style.overflow;
-      // Firefox scroll position is lost when overflow: 'hidden' is applied so we skip applying it.
-      // The measure/applied height is also incorrect/reset if we turn on and off
-      // overflow: hidden in Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=1787062
-      const isFirefox = "MozAppearance" in input.style;
-
-      if (!isFirefox) {
-        input.style.overflow = "hidden";
-      }
-
-      input.style.alignSelf = "start";
-      input.style.height = "auto";
-
-      const computedStyle = window.getComputedStyle(input);
-      const height = parseFloat(computedStyle.height) || 0;
-      const paddingTop = parseFloat(computedStyle.paddingTop) || 0;
-      const paddingBottom = parseFloat(computedStyle.paddingBottom) || 0;
-      const textHeight = input.scrollHeight - paddingTop - paddingBottom + 1;
-
-      if (Math.abs(textHeight - height) > 10) {
-        input.style.height = `${textHeight}px`;
-      } else {
-        input.style.height = "auto";
-      }
-
-      input.style.overflow = prevOverflow;
-      input.style.alignSelf = prevAlignment;
-    }
-  }, [inputRef, props.height]);
-
-  const handleKeyDown = useCallback(
-    (event: React.KeyboardEvent<HTMLTextAreaElement>) => {
-      if (Boolean(isSubmitDisabled)) return;
-
-      if (event.key === "Enter" && (event.metaKey || event.ctrlKey)) {
-        event.preventDefault();
-        onSubmit?.();
-      }
-    },
-    [onSubmit, isSubmitDisabled],
-  );
-
-  useLayoutEffect(() => {
-    if (inputRef.current) {
-      onHeightChange();
-    }
-  }, [onHeightChange, inputValue]);
-
-  const suffix = (function () {
-    if (Boolean(suffixProp)) return suffixProp;
-
-    if (Boolean(isLoading)) {
-      return (
-        <IconButton
-          icon="player-stop-filled"
-          isDisabled={Boolean(isDisabled) || Boolean(isSubmitDisabled)}
-          onPress={onSubmit}
-        />
-      );
-    }
-
-    return (
-      <IconButton
-        icon="arrow-up"
-        isDisabled={Boolean(isDisabled) || Boolean(isSubmitDisabled)}
-        onPress={onSubmit}
-      />
-    );
-  })();
-
-  const styles = {
-    // The --input-height is required to make the icon button vertically centered.
-    // Why can't we do this with CSS? Reason is that the height of the input is calculated based on the content.
-    "--input-height": Boolean(initialHeight) ? `${initialHeight}px` : "auto",
-  } as React.CSSProperties;
-
-  return (
-    <HeadlessTextField
-      {...rest}
-      className={clsx(inputFieldStyles.field)}
-      isDisabled={Boolean(isDisabled)}
-      isInvalid={isInvalid}
-      isReadOnly={isReadOnly}
-      isRequired={isRequired}
-      onChange={chain(onChange, setInputValue)}
-      style={styles}
-      value={value}
-    >
-      <FieldLabel
-        contextualHelp={contextualHelp}
-        isDisabled={isDisabled}
-        isRequired={isRequired}
-      >
-        {label}
-      </FieldLabel>
-      <TextAreaInput
-        isReadOnly={isReadOnly}
-        onKeyDown={handleKeyDown}
-        prefix={prefix}
-        ref={inputRef}
-        rows={1}
-        size="large"
-        suffix={suffix}
-        value={value}
-      />
-      <FieldError>{errorMessage}</FieldError>
-    </HeadlessTextField>
-  );
-}

app/client/packages/design-system/widgets/src/components/ChatInput/src/types.ts

@@ -1,8 +0,0 @@
-import type { TextAreaProps } from "@appsmith/wds";
-
-export interface ChatInputProps extends TextAreaProps {
-  /** callback function when the user submits the chat input */
-  onSubmit?: () => void;
-  /** flag for disable the submit button */
-  isSubmitDisabled?: boolean;
-}