Remove redundant int cast

Remove a redundant int cast in the calculation of fwdOut. The variable
OutputType is already defined as std::int32_t, which is an integer type, making
the cast unnecessary.

closes official-stockfish#4961

No functional change

src/nnue/nnue_architecture.h

@@ -116,7 +116,7 @@ struct Network {
         // buffer.fc_0_out[FC_0_OUTPUTS] is such that 1.0 is equal to 127*(1<<WeightScaleBits) in
         // quantized form, but we want 1.0 to be equal to 600*OutputScale
         std::int32_t fwdOut =
-          int(buffer.fc_0_out[FC_0_OUTPUTS]) * (600 * OutputScale) / (127 * (1 << WeightScaleBits));
+          (buffer.fc_0_out[FC_0_OUTPUTS]) * (600 * OutputScale) / (127 * (1 << WeightScaleBits));
         std::int32_t outputValue = buffer.fc_2_out[0] + fwdOut;
 
         return outputValue;