Fix: Remove duplicate code in moving_average.js

The file had duplicate calculate() and getMetadata() methods causing syntax errors.
Removed duplicate code from lines 214-251.
Now the file has a single proper implementation.

src/api/dashboard/static/js/indicators/moving_average.js

@@ -211,43 +211,6 @@ let maValues;
             displayMode: 'overlay'
         };
     }
-        
-        return maValues;
-    }
-    
-    getMetadata() {
-        return {
-            name: 'MA',
-            description: 'Moving Average (SMA/EMA/RMA/WMA/VWMA)',
-            inputs: [
-                {
-                    name: 'period',
-                    label: 'Period',
-                    type: 'number',
-                    default: 44,
-                    min: 1,
-                    max: 500
-                },
-                {
-                    name: 'maType',
-                    label: 'MA Type',
-                    type: 'select',
-                    options: ['SMA', 'EMA', 'RMA', 'WMA', 'VWMA'],
-                    default: 'SMA'
-                }
-            ],
-            plots: [
-                {
-                    id: 'value',
-                    color: '#2962ff',
-                    title: 'MA',
-                    style: 'solid',
-                    width: 1
-                }
-            ],
-            displayMode: 'overlay'
-        };
-    }
 }
 
 // Export signal function for external use