removed dummy loop to Field mul

.github/workflows/benchmark.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   master-benchmark:
-    name: Benchmark
+    name: Benchmark Master
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2

src/field/Field.h

@@ -128,10 +128,7 @@ class Field {
         auto rhs_data = rhs.data;
 #pragma acc parallel loop independent present(this->data[:m_size], rhs_data[:m_size]) async
         for (size_t i = 0; i < m_size; ++i) {
-            this->data[i] *= rhs_data[i] * rhs_data[i];
-        }
-        for (size_t i = 0; i < m_size; ++i) {
-            this->data[i] /= rhs_data[i];
+            this->data[i] *= rhs_data[i];
         }
 #pragma acc wait
         return *this;