removed pallet::getter from example pallets (#3371)

part of #3326 

@ggwpez @kianenigma @shawntabrizi

---------

Signed-off-by: Matteo Muraca <mmuraca247@gmail.com>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

substrate/frame/examples/kitchensink/src/benchmarking.rs

@@ -51,7 +51,7 @@ mod benchmarks {
 		set_foo(RawOrigin::Root, value, 10u128); // The execution phase is just running `set_foo` extrinsic call
 
 		// This is the optional benchmark verification phase, asserting certain states.
-		assert_eq!(Pallet::<T>::foo(), Some(value))
+		assert_eq!(Foo::<T>::get(), Some(value))
 	}
 
 	// This line generates test cases for benchmarking, and could be run by:

substrate/frame/examples/kitchensink/src/lib.rs

@@ -125,7 +125,6 @@ pub mod pallet {
 	#[pallet::storage]
 	#[pallet::unbounded] // optional
 	#[pallet::storage_prefix = "OtherFoo"] // optional
-	#[pallet::getter(fn foo)] // optional
 	pub type Foo<T> = StorageValue<Value = u32>;
 
 	#[pallet::type_value]