Revert preact signals support (#4843)

* Revert "Update preact example to match @astrojs/preact ranges (#4840)"

This reverts commit d650a1161a0288f8f2d35ae67771279d067920e9.

* Revert "[ci] format"

This reverts commit e3c78c5b164c338389c437743ba02a7be64e27fb.

* Revert "Support shared signals in Preact islands (#4763)"

This reverts commit 5e46be54683592773e6dfc2d33825493886114b0.

1 files changed, 0 insertions, 53 deletions

diff --git a/packages/integrations/preact/src/signals.ts b/packages/integrations/preact/src/signals.ts
deleted file mode 100644
index 3fa1529f4..000000000
--- a/packages/integrations/preact/src/signals.ts
+++ /dev/null
@@ -1,53 +0,0 @@
-import type { Context } from './context';
-import { incrementId } from './context.js';
-import type { AstroPreactAttrs, PropNameToSignalMap, SignalLike } from './types';
-
-function isSignal(x: any): x is SignalLike {
-	return x != null && typeof x === 'object' && typeof x.peek === 'function' && 'value' in x;
-}
-
-export function restoreSignalsOnProps(ctx: Context, props: Record<string, any>) {
-	// Restore signal props that were mutated for serialization
-	let propMap: PropNameToSignalMap;
-	if (ctx.propsToSignals.has(props)) {
-		propMap = ctx.propsToSignals.get(props)!;
-	} else {
-		propMap = new Map();
-		ctx.propsToSignals.set(props, propMap);
-	}
-	for (const [key, signal] of propMap) {
-		props[key] = signal;
-	}
-	return propMap;
-}
-
-export function serializeSignals(
-	ctx: Context,
-	props: Record<string, any>,
-	attrs: AstroPreactAttrs,
-	map: PropNameToSignalMap
-) {
-	// Check for signals
-	const signals: Record<string, string> = {};
-	for (const [key, value] of Object.entries(props)) {
-		if (isSignal(value)) {
-			// Set the value to the current signal value
-			// This mutates the props on purpose, so that it will be serialized correct.
-			props[key] = value.peek();
-			map.set(key, value);
-
-			let id: string;
-			if (ctx.signals.has(value)) {
-				id = ctx.signals.get(value)!;
-			} else {
-				id = incrementId(ctx);
-				ctx.signals.set(value, id);
-			}
-			signals[key] = id;
-		}
-	}
-
-	if (Object.keys(signals).length) {
-		attrs['data-preact-signals'] = JSON.stringify(signals);
-	}
-}