varaverk: remove GPU history chart

Plugin/usr/local/emhttp/plugins/varaverk/pages/monitor.php

@@ -75,7 +75,7 @@ function vvMeter(label, pct, text) {
 
 const VV_HIST_MAX = 24; // 24 × 5 s = 120 s
 let vvCpuHistory    = [];
-let vvGpuHistory    = [];
+
 let vvNetRxHistory  = [];
 let vvNetTxHistory  = [];
 
@@ -459,12 +459,7 @@ function vvPollMonitor() {
              <span style="color:${tempColor};font-weight:bold;">${temp}°C</span>
              <span style="color:#666;margin-left:12px;">Power</span>
              <span style="color:#aaa;font-weight:bold;">${powerStr}</span>
-           </div>` +
-          `<canvas id="vv-gpu-canvas" style="width:100%;height:60px;display:block;"></canvas>`;
-
-        vvGpuHistory.push(utilPct);
-        if (vvGpuHistory.length > VV_HIST_MAX) vvGpuHistory.shift();
-        vvDrawChart(document.getElementById('vv-gpu-canvas'), vvGpuHistory, '#7e57c2', 'rgba(126,87,194,0.18)', true);
+           </div>`;
       } else {
         document.getElementById('vv-gpu-body').innerHTML = '<p style="color:#555;font-style:italic">No GPU detected</p>';
       }