remove usage examples

Author: LadyBluenotes

src/routes/reference/basic-reactivity/create-signal.mdx

@@ -101,91 +101,6 @@ Returns a tuple `[getter, setter]` where:
 
 ## Usage
 
-### Creating a signal with an initial value
-
-```typescript
-const [count, setCount] = createSignal(0);
-
-console.log(count()); // 0
-setCount(5);
-console.log(count()); // 5
-```
-
-### Creating a signal without an initial value
-
-```typescript
-const [name, setName] = createSignal<string>();
-
-console.log(name()); // undefined
-setName("John");
-console.log(name()); // "John"
-```
-
-### Functional updates
-
-```typescript
-const [count, setCount] = createSignal(0);
-
-setCount(prev => prev + 1);
-console.log(count()); // 1
-
-setCount(c => c * 2);
-console.log(count()); // 2
-```
-
-## Advanced Usage
-
-### Using a custom equality function
-
-```typescript
-const [user, setUser] = createSignal(
-  { name: "John", age: 25 },
-  { 
-    equals: (prev, next) => prev.name === next.name && prev.age === next.age 
-  }
-);
-
-// This won't trigger updates because the values are considered equal
-setUser({ name: "John", age: 25 });
-```
-
-### Disabling equality checking
-
-```typescript
-const [data, setData] = createSignal([], { equals: false });
-
-// This will always trigger updates, even with the same array reference
-setData([]);
-```
-
-### Development debugging
-
-```typescript
-const [state, setState] = createSignal(
-  { loading: false, data: null },
-  { name: "apiState" }
-);
-```
-
-## Common Patterns
-
-### Boolean toggle
-
-```typescript
-const [isOpen, setIsOpen] = createSignal(false);
-const toggle = () => setIsOpen(prev => !prev);
-```
-
-### Object updates
-
-```typescript
-const [user, setUser] = createSignal({ name: "John", age: 25 });
-
-// Update specific property
-const updateName = (newName: string) => 
-  setUser(prev => ({ ...prev, name: newName }));
-```
-
 ## How It Works
 
 Signals are the foundational primitive of SolidJS's fine-grained reactivity system.