chore: ignore unused variables

exercises/enums/enums3.cairo

@@ -32,11 +32,11 @@ trait StateTrait {
 }
 impl StateImpl of StateTrait {
     fn change_color(ref self: State, new_color: (u8, u8, u8)) {
-        let State{color, position, quit, } = self;
+        let State{color: _color, position, quit, } = self;
         self = State { color: new_color, position: position, quit: quit,  };
     }
     fn quit(ref self: State) {
-        let State{color, position, quit, } = self;
+        let State{color, position, quit: _quit, } = self;
         self = State { color: color, position: position, quit: true,  };
     }
 
@@ -45,7 +45,7 @@ impl StateImpl of StateTrait {
     }
 
     fn move_position(ref self: State, p: Point) {
-        let State{color, position, quit, } = self;
+        let State{color, position: _posiotion, quit, } = self;
         self = State { color: color, position: p, quit: quit,  };
     }
 

exercises/move_semantics/move_semantics2.cairo

@@ -10,7 +10,7 @@ use debug::PrintTrait;
 fn main() {
     let arr0 = ArrayTrait::new();
 
-    let mut arr1 = fill_arr(arr0);
+    let mut _arr1 = fill_arr(arr0);
 
     // Do not change the following line!
     arr0.print();

exercises/operations/operations2.cairo

@@ -55,5 +55,5 @@ fn test_mul() {
 #[test]
 #[should_panic]
 fn test_u64_mul_overflow_1() {
-    let res = multiplication(0x100000000, 0x100000000);
+    let _res = multiplication(0x100000000, 0x100000000);
 }

exercises/starknet/basics/starknet1.cairo

@@ -41,7 +41,7 @@ mod test {
     #[available_gas(2000000000)]
     fn test_contract_view() {
         let dispatcher = deploy_contract();
-        let owner = dispatcher.get_owner();
+        let _owner = dispatcher.get_owner();
         assert('Joe' == dispatcher.get_owner(), 'Joe should be the owner.');
     }
 

exercises/starknet/basics/starknet2.cairo

@@ -55,7 +55,7 @@ mod test {
     #[test]
     #[available_gas(2000000000)]
     fn test_owner_setting() {
-        let owner: felt252 = 'Jill';
+        let _owner: felt252 = 'Jill';
         let mut calldata = ArrayTrait::new();
         calldata.append('Jill');
         let (address0, _) = deploy_syscall(

exercises/starknet/basics/starknet4.cairo

@@ -112,7 +112,7 @@ mod test {
     fn test_stock_purchase() {
         let owner = util_felt_addr('Elizabeth');
         let dispatcher = deploy_contract();
-        let result = dispatcher.get_owner();
+        let _result = dispatcher.get_owner();
         // Call contract as owner
         starknet::testing::set_contract_address(owner);