globals: interfere singleton-ness from the Singleton enum

src/ifs/wl_seat/ext_transient_seat_manager_v1.rs

@@ -52,10 +52,6 @@ global_base!(
 );
 
 impl Global for ExtTransientSeatManagerV1Global {
-    fn singleton(&self) -> bool {
-        true
-    }
-
     fn version(&self) -> u32 {
         1
     }

src/ifs/wl_seat/tablet/zwp_tablet_manager_v2.rs

@@ -52,10 +52,6 @@ global_base!(
 );
 
 impl Global for ZwpTabletManagerV2Global {
-    fn singleton(&self) -> bool {
-        true
-    }
-
     fn version(&self) -> u32 {
         2
     }

src/ifs/wl_seat/text_input/zwp_input_method_manager_v2.rs

@@ -52,10 +52,6 @@ global_base!(
 );
 
 impl Global for ZwpInputMethodManagerV2Global {
-    fn singleton(&self) -> bool {
-        true
-    }
-
     fn version(&self) -> u32 {
         1
     }

src/ifs/wl_seat/text_input/zwp_text_input_manager_v3.rs

@@ -52,10 +52,6 @@ global_base!(
 );
 
 impl Global for ZwpTextInputManagerV3Global {
-    fn singleton(&self) -> bool {
-        true
-    }
-
     fn version(&self) -> u32 {
         1
     }

src/ifs/wl_seat/wp_pointer_warp_v1.rs

@@ -45,10 +45,6 @@ impl WpPointerWarpV1Global {
 global_base!(WpPointerWarpV1Global, WpPointerWarpV1, WpPointerWarpV1Error);
 
 impl Global for WpPointerWarpV1Global {
-    fn singleton(&self) -> bool {
-        true
-    }
-
     fn version(&self) -> u32 {
         1
     }

src/ifs/wl_seat/zwp_pointer_constraints_v1.rs

@@ -313,10 +313,6 @@ global_base!(
 );
 
 impl Global for ZwpPointerConstraintsV1Global {
-    fn singleton(&self) -> bool {
-        true
-    }
-
     fn version(&self) -> u32 {
         1
     }

src/ifs/wl_seat/zwp_pointer_gestures_v1.rs

@@ -56,10 +56,6 @@ global_base!(
 );
 
 impl Global for ZwpPointerGesturesV1Global {
-    fn singleton(&self) -> bool {
-        true
-    }
-
     fn version(&self) -> u32 {
         3
     }

src/ifs/wl_seat/zwp_relative_pointer_manager_v1.rs

@@ -52,10 +52,6 @@ global_base!(
 );
 
 impl Global for ZwpRelativePointerManagerV1Global {
-    fn singleton(&self) -> bool {
-        true
-    }
-
     fn version(&self) -> u32 {
         1
     }

src/ifs/wl_seat/zwp_virtual_keyboard_manager_v1.rs

@@ -53,10 +53,6 @@ global_base!(
 );
 
 impl Global for ZwpVirtualKeyboardManagerV1Global {
-    fn singleton(&self) -> bool {
-        true
-    }
-
     fn version(&self) -> u32 {
         1
     }