Remove padding from triangle

wgpu/src/triangle.rs

@@ -425,18 +425,12 @@ impl Pipeline {
 #[derive(Debug, Clone, Copy, Zeroable, Pod)]
 struct Uniforms {
     transform: [f32; 16],
-    // We need to align this to 256 bytes to please `wgpu`...
-    // TODO: Be smarter and stop wasting memory!
-    _padding_a: [f32; 32],
-    _padding_b: [f32; 16],
 }
 
 impl Default for Uniforms {
     fn default() -> Self {
         Self {
             transform: *Transformation::identity().as_ref(),
-            _padding_a: [0.0; 32],
-            _padding_b: [0.0; 16],
         }
     }
 }
@@ -445,8 +439,6 @@ impl From<Transformation> for Uniforms {
     fn from(transformation: Transformation) -> Uniforms {
         Self {
             transform: transformation.into(),
-            _padding_a: [0.0; 32],
-            _padding_b: [0.0; 16],
         }
     }
 }