remove some redundant casts

src/module/rolls/check-factory.ts

@@ -10,7 +10,7 @@ class DefaultCheckOptions implements DS4CheckFactoryOptions {
     readonly rollMode: DS4RollMode = "roll";
 
     mergeWith(other: Partial<DS4CheckFactoryOptions>): DS4CheckFactoryOptions {
-        return { ...this, ...other } as DS4CheckFactoryOptions;
+        return { ...this, ...other };
     }
 }
 

src/module/rolls/check.ts

@@ -110,7 +110,7 @@ export class DS4Check extends DiceTerm {
 
                 let checked = 0;
                 while (checked < intermediateResults.length) {
-                    const r = (intermediateResults as Array<RollResult>)[checked];
+                    const r = intermediateResults[checked];
                     checked++;
                     if (!r.active) continue;
 

src/module/rolls/roll-data.ts

@@ -12,7 +12,7 @@ export class DefaultRollOptions implements RollOptions {
     public slayingDiceRepetition = false;
 
     mergeWith(other: Partial<RollOptions>): RollOptions {
-        return { ...this, ...other } as RollOptions;
+        return { ...this, ...other };
     }
 }