Remove unused functions in with-variant tests

Macro expansion fails before it would generate code to call any of these.

test_suite/tests/compile-fail/with-variant/skip_de_newtype_field.rs

@@ -16,10 +16,4 @@ enum Enum {
     Newtype(#[serde(skip_deserializing)] String),
 }
 
-fn deserialize_some_newtype_variant<'de, D>(_: D) -> StdResult<String, D::Error>
-    where D: Deserializer<'de>,
-{
-    unimplemented!()
-}
-
 fn main() { }

test_suite/tests/compile-fail/with-variant/skip_de_struct_field.rs

@@ -20,10 +20,4 @@ enum Enum {
     },
 }
 
-fn deserialize_some_other_variant<'de, D>(_: D) -> StdResult<(String, u8), D::Error>
-    where D: Deserializer<'de>,
-{
-    unimplemented!()
-}
-
 fn main() { }

test_suite/tests/compile-fail/with-variant/skip_de_tuple_field.rs

@@ -16,10 +16,4 @@ enum Enum {
     Tuple(#[serde(skip_deserializing)] String, u8),
 }
 
-fn deserialize_some_other_variant<'de, D>(_: D) -> StdResult<(String, u8), D::Error>
-    where D: Deserializer<'de>,
-{
-    unimplemented!()
-}
-
 fn main() { }

test_suite/tests/compile-fail/with-variant/skip_de_whole_variant.rs

@@ -17,10 +17,4 @@ enum Enum {
     Unit,
 }
 
-fn deserialize_some_unit_variant<'de, D>(_: D) -> StdResult<(), D::Error>
-    where D: Deserializer<'de>,
-{
-    unimplemented!()
-}
-
 fn main() { }

test_suite/tests/compile-fail/with-variant/skip_ser_newtype_field.rs

@@ -16,10 +16,4 @@ enum Enum {
     Newtype(#[serde(skip_serializing)] String),
 }
 
-fn serialize_some_newtype_variant<S>(_: &String) -> StdResult<S::Ok, S::Error>
-    where S: Serializer,
-{
-    unimplemented!()
-}
-
 fn main() { }

test_suite/tests/compile-fail/with-variant/skip_ser_newtype_field_if.rs

@@ -16,12 +16,4 @@ enum Enum {
     Newtype(#[serde(skip_serializing_if = "always")] String),
 }
 
-fn serialize_some_newtype_variant<S>(_: &String) -> StdResult<S::Ok, S::Error>
-    where S: Serializer,
-{
-    unimplemented!()
-}
-
-fn always<T>(_: &T) -> bool { true }
-
 fn main() { }

test_suite/tests/compile-fail/with-variant/skip_ser_struct_field.rs

@@ -20,10 +20,4 @@ enum Enum {
     },
 }
 
-fn serialize_some_other_variant<S>(_: &String, _: Option<&u8>, _: S) -> StdResult<S::Ok, S::Error>
-    where S: Serializer,
-{
-    unimplemented!()
-}
-
 fn main() { }

test_suite/tests/compile-fail/with-variant/skip_ser_struct_field_if.rs

@@ -20,12 +20,4 @@ enum Enum {
     },
 }
 
-fn serialize_some_other_variant<S>(_: &String, _: Option<&u8>, _: S) -> StdResult<S::Ok, S::Error>
-    where S: Serializer,
-{
-    unimplemented!()
-}
-
-fn always<T>(_: &T) -> bool { true }
-
 fn main() { }

test_suite/tests/compile-fail/with-variant/skip_ser_tuple_field.rs

@@ -16,10 +16,4 @@ enum Enum {
     Tuple(#[serde(skip_serializing)] String, u8),
 }
 
-fn serialize_some_other_variant<S>(_: &String, _: Option<&u8>, _: S) -> StdResult<S::Ok, S::Error>
-    where S: Serializer,
-{
-    unimplemented!()
-}
-
 fn main() { }

test_suite/tests/compile-fail/with-variant/skip_ser_tuple_field_if.rs

@@ -16,12 +16,4 @@ enum Enum {
     Tuple(#[serde(skip_serializing_if = "always")] String, u8),
 }
 
-fn serialize_some_other_variant<S>(_: &String, _: Option<&u8>, _: S) -> StdResult<S::Ok, S::Error>
-    where S: Serializer,
-{
-    unimplemented!()
-}
-
-fn always<T>(_: &T) -> bool { true }
-
 fn main() { }

test_suite/tests/compile-fail/with-variant/skip_ser_whole_variant.rs

@@ -17,10 +17,4 @@ enum Enum {
     Unit,
 }
 
-fn serialize_some_unit_variant<S>(_: S) -> StdResult<S::Ok, S::Error>
-    where S: Serializer,
-{
-    unimplemented!()
-}
-
 fn main() { }