Remove redundant notification

`uploadArtifact` already prints a more detailed message.

Author: ageorgou

index.js

@@ -26319,8 +26319,6 @@ var main = async () => {
     const result = await client.uploadArtifact(core.getInput("artifact_name"), [outputFile], ".");
     if (result.failedItems.length > 0) {
       throw "Artifact was not uploaded successfully.";
-    } else {
-      core.info(`Diagram uploaded under name ${result.artifactName}`);
     }
     core.endGroup();
   }

src/index.jsx

@@ -92,8 +92,6 @@ const main = async () => {
     const result = await client.uploadArtifact(core.getInput('artifact_name'), [outputFile], '.')
     if (result.failedItems.length > 0) {
       throw 'Artifact was not uploaded successfully.'
-    } else {
-      core.info(`Diagram uploaded under name ${result.artifactName}`)
     }
     core.endGroup()
   }