Removed redundant Share button

bicorder-app/src/components/ExportControls.svelte

@@ -33,30 +33,6 @@
     URL.revokeObjectURL(url);
   }
 
-  async function shareResults() {
-    const json = JSON.stringify(data, null, 2);
-    const file = new File([json], `bicorder-${data.metadata.protocol || 'diagnostic'}.json`, {
-      type: 'application/json',
-    });
-
-    if (navigator.share && navigator.canShare && navigator.canShare({ files: [file] })) {
-      try {
-        await navigator.share({
-          title: 'Protocol Bicorder Diagnostic',
-          text: `Diagnostic for: ${data.metadata.protocol || 'Protocol'}`,
-          files: [file],
-        });
-      } catch (err) {
-        if ((err as Error).name !== 'AbortError') {
-          console.error('Share failed:', err);
-          alert('Share failed. Try using the Export button instead.');
-        }
-      }
-    } else {
-      alert('Web Share API not supported. Use the Export button to download the file.');
-    }
-  }
-
   async function uploadReadings() {
     isUploading = true;
 
@@ -128,12 +104,6 @@
       💾 Export JSON
     </button>
 
-    {#if navigator.share}
-      <button on:click={shareResults}>
-        📤 Share
-      </button>
-    {/if}
-
     <button on:click={() => showUploadDialog = !showUploadDialog}>
       📤 Upload
     </button>