assessmentsAverage: Fix inaccurate weight when a weight == N/A

N/A weights were automatically set to a weight of 1 for some reason. I removed it from the calculations completely with this commit.

src/plugins/built-in/assessmentsAverage/utils.ts

@@ -605,8 +605,7 @@ export async function processAssessments(api: any, assessmentItems: Element[]) {
       weighting === "processing"
     ) {
       hasInaccurateWeighting = true;
-      weightedTotal += grade;
-      totalWeight += 1;
+      continue
     } else {
       const weight = parseFloat(weighting);