Remove linear activation kernel

src/kernels/activations.cu

@@ -24,13 +24,3 @@ relu_kernel(const float* __restrict__ src, float* __restrict__ dst, int len) {
         dst[i] = src[i] < 0.0 ? 0.0 : src[i];
     }
 }
-
-__global__ void
-linear_kernel(const float* __restrict__ src, float* __restrict__ dst, int len) {
-    int stride = gridDim.x * blockDim.x;
-    int tid    = blockDim.x * blockIdx.x + threadIdx.x;
-
-    for (int i = tid; i < len; i += stride) {
-        dst[i] = src[i];
-    }
-}

src/layers/dense.cu

@@ -75,9 +75,6 @@ void Layers::Dense::forward(const float* d_input, float* d_output) {
             break;
 
         default:
-            linear_kernel<<<1, outputSize>>>(
-                d_output, d_output, outputSize
-            );
             break;
     }