Remove PrimitiveMut::clear

PiperOrigin-RevId: 589296171

rust/primitive.rs

@@ -55,12 +55,6 @@ macro_rules! impl_singular_primitives {
               pub fn set(&mut self, val: impl SettableValue<$t>) {
                   val.set_on(Private, self.as_mut());
               }
-
-              pub fn clear(&mut self) {
-                  // The default value for a boolean field is false and 0 for numerical types. It
-                  // matches the Rust default values for corresponding types. Let's use this fact.
-                  SettableValue::<$t>::set_on(<$t>::default(), Private, MutProxy::as_mut(self));
-              }
           }
 
           impl<'a> ViewProxy<'a> for PrimitiveMut<'a, $t> {

rust/test/shared/accessors_proto3_test.rs

@@ -23,7 +23,7 @@ fn test_fixed32_accessors() {
     assert_that!(msg.optional_fixed32_mut().get(), eq(42));
     assert_that!(msg.optional_fixed32(), eq(42));
 
-    msg.optional_fixed32_mut().clear();
+    msg.optional_fixed32_mut().set(u32::default());
     assert_that!(msg.optional_fixed32(), eq(0));
     assert_that!(msg.optional_fixed32_mut().get(), eq(0));
 }
@@ -38,7 +38,7 @@ fn test_bool_accessors() {
     assert_that!(msg.optional_bool(), eq(true));
     assert_that!(msg.optional_bool_mut().get(), eq(true));
 
-    msg.optional_bool_mut().clear();
+    msg.optional_bool_mut().set(bool::default());
     assert_that!(msg.optional_bool(), eq(false));
     assert_that!(msg.optional_bool_mut().get(), eq(false));
 }