Removed rounding causing images to scale on viewer (#3237)

# Description of Changes

Please provide a summary of the changes, including:

- What was changed

Removed forced rounding up of image sizes when added to a pdf. 
- Why the change was made

This was originally added as part of [pull
2433](https://github.com/Stirling-Tools/Stirling-PDF/pull/2433) to aid
with redaction. I assume it was added so that redactions always round up
to cover every considered pixel.

This rounding-up logic had issues on certain browsers. 


Closes #(3199)

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

src/main/resources/static/pdfjs-legacy/pdf.mjs

@@ -4630,7 +4630,7 @@ if (DESCRIPTORS && !('size' in URLSearchParamsPrototype)) {
 /************************************************************************/
 /******/ // The module cache
 /******/ var __webpack_module_cache__ = {};
-/******/
+/******/ 
 /******/ // The require function
 /******/ function __webpack_require__(moduleId) {
 /******/ 	// Check if module is in cache
@@ -4644,14 +4644,14 @@ if (DESCRIPTORS && !('size' in URLSearchParamsPrototype)) {
 /******/ 		// no module.loaded needed
 /******/ 		exports: {}
 /******/ 	};
-/******/
+/******/ 
 /******/ 	// Execute the module function
 /******/ 	__webpack_modules__[moduleId].call(module.exports, module, module.exports, __webpack_require__);
-/******/
+/******/ 
 /******/ 	// Return the exports of the module
 /******/ 	return module.exports;
 /******/ }
-/******/
+/******/ 
 /************************************************************************/
 /******/ /* webpack/runtime/define property getters */
 /******/ (() => {
@@ -4664,12 +4664,12 @@ if (DESCRIPTORS && !('size' in URLSearchParamsPrototype)) {
 /******/ 		}
 /******/ 	};
 /******/ })();
-/******/
+/******/ 
 /******/ /* webpack/runtime/hasOwnProperty shorthand */
 /******/ (() => {
 /******/ 	__webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))
 /******/ })();
-/******/
+/******/ 
 /************************************************************************/
 var __webpack_exports__ = globalThis.pdfjsLib = {};
 // This entry need to be wrapped in an IIFE because it need to be isolated against other modules in the chunk.
@@ -6385,8 +6385,8 @@ function setLayerDimensions(div, viewport, mustFlip = false, mustRotate = true)
     const useRound = util_FeatureTest.isCSSRoundSupported;
     const w = `var(--scale-factor) * ${pageWidth}px`,
       h = `var(--scale-factor) * ${pageHeight}px`;
-    const widthStr = useRound ? `round(up, ${w}, 1px)` : `calc(${w})`,
-      heightStr = useRound ? `round(up, ${h}, 1px)` : `calc(${h})`;
+    const widthStr = useRound ? `round(${w}, 1px)` : `calc(${w})`,
+      heightStr = useRound ? `round(${h}, 1px)` : `calc(${h})`;
     if (!mustFlip || viewport.rotation % 180 === 0) {
       style.width = widthStr;
       style.height = heightStr;